diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0576c43..a287ae9 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -2,6 +2,7 @@
 import withNuxt from "./.nuxt/eslint.config.mjs";
 import eslintConfigPrettier from "eslint-config-prettier/flat";
 import vueI18n from "@intlify/eslint-plugin-vue-i18n";
+import noPrismaDelete from "./rules/no-prisma-delete.mts";
 
 export default withNuxt([
   eslintConfigPrettier,
@@ -19,6 +20,7 @@ export default withNuxt([
         },
       ],
       "@intlify/vue-i18n/no-missing-keys": "error",
+      "drop/no-prisma-delete": "error",
     },
     settings: {
       "vue-i18n": {
@@ -29,5 +31,8 @@ export default withNuxt([
         messageSyntaxVersion: "^11.0.0",
       },
     },
+    plugins: {
+      drop: { rules: { "no-prisma-delete": noPrismaDelete } },
+    },
   },
 ]);
diff --git a/rules/no-prisma-delete.mts b/rules/no-prisma-delete.mts
new file mode 100644
index 0000000..e190fab
--- /dev/null
+++ b/rules/no-prisma-delete.mts
@@ -0,0 +1,32 @@
+import type { TSESLint } from "@typescript-eslint/utils";
+
+export default {
+  meta: {
+    type: "problem",
+    docs: {
+      description: "Don't use Prisma error-prone .delete function",
+    },
+    messages: {
+      noPrismaDelete:
+        "Prisma .delete(...) function is used. Use .deleteMany(..) and check count instead.",
+    },
+    schema: [],
+  },
+  create(context) {
+    return {
+      CallExpression: function (node) {
+        const funcId = node.callee.property;
+        if (!funcId || funcId.name !== "delete") return;
+        const tableExpr = node.callee.object;
+        if (!tableExpr) return;
+        const prismaExpr = tableExpr.object;
+        if (!prismaExpr || prismaExpr.name !== "prisma") return;
+        context.report({
+          node,
+          messageId: "noPrismaDelete",
+        });
+      },
+    };
+  },
+  defaultOptions: [],
+} satisfies TSESLint.RuleModule<"noPrismaDelete">;
diff --git a/server/api/v1/admin/auth/invitation/index.delete.ts b/server/api/v1/admin/auth/invitation/index.delete.ts
index 195aae5..43177ad 100644
--- a/server/api/v1/admin/auth/invitation/index.delete.ts
+++ b/server/api/v1/admin/auth/invitation/index.delete.ts
@@ -17,6 +17,10 @@ export default defineEventHandler<{
 
   const body = await readDropValidatedBody(h3, DeleteInvite);
 
-  await prisma.invitation.delete({ where: { id: body.id } });
+  const { count } = await prisma.invitation.deleteMany({
+    where: { id: body.id },
+  });
+  if (count == 0)
+    throw createError({ statusCode: 404, message: "Invitation not found." });
   return {};
 });
diff --git a/server/api/v1/admin/game/[id]/index.delete.ts b/server/api/v1/admin/game/[id]/index.delete.ts
index 66e7027..1b32550 100644
--- a/server/api/v1/admin/game/[id]/index.delete.ts
+++ b/server/api/v1/admin/game/[id]/index.delete.ts
@@ -7,7 +7,7 @@ export default defineEventHandler(async (h3) => {
 
   const gameId = getRouterParam(h3, "id")!;
 
-  libraryManager.deleteGame(gameId);
+  await libraryManager.deleteGame(gameId);
 
   return {};
 });
diff --git a/server/api/v1/admin/library/sources/index.delete.ts b/server/api/v1/admin/library/sources/index.delete.ts
index 165a9b2..b4594e2 100644
--- a/server/api/v1/admin/library/sources/index.delete.ts
+++ b/server/api/v1/admin/library/sources/index.delete.ts
@@ -18,11 +18,13 @@ export default defineEventHandler<{ body: typeof DeleteLibrarySource.infer }>(
 
     const body = await readDropValidatedBody(h3, DeleteLibrarySource);
 
-    await prisma.library.delete({
+    const { count } = await prisma.library.deleteMany({
       where: {
         id: body.id,
       },
     });
+    if (count == 0)
+      throw createError({ statusCode: 404, message: "Library not found." });
 
     libraryManager.removeLibrary(body.id);
   },
diff --git a/server/api/v1/admin/token/[id]/index.delete.ts b/server/api/v1/admin/token/[id]/index.delete.ts
index 1e33730..dd9fac5 100644
--- a/server/api/v1/admin/token/[id]/index.delete.ts
+++ b/server/api/v1/admin/token/[id]/index.delete.ts
@@ -13,10 +13,10 @@ export default defineEventHandler(async (h3) => {
       statusMessage: "No id in router params",
     });
 
-  const deleted = await prisma.aPIToken.delete({
+  const { count } = await prisma.aPIToken.deleteMany({
     where: { id: id, mode: APITokenMode.System },
   })!;
-  if (!deleted)
+  if (count == 0)
     throw createError({ statusCode: 404, statusMessage: "Token not found" });
 
   return;
diff --git a/server/api/v1/admin/users/[id]/index.delete.ts b/server/api/v1/admin/users/[id]/index.delete.ts
index 4b5b141..dc8f790 100644
--- a/server/api/v1/admin/users/[id]/index.delete.ts
+++ b/server/api/v1/admin/users/[id]/index.delete.ts
@@ -27,6 +27,7 @@ export default defineEventHandler(async (h3) => {
   if (!user)
     throw createError({ statusCode: 404, statusMessage: "User not found." });
 
+  // eslint-disable-next-line drop/no-prisma-delete
   await prisma.user.delete({ where: { id: userId } });
   await userStatsManager.deleteUser();
   return { success: true };
diff --git a/server/api/v1/auth/signup/simple.post.ts b/server/api/v1/auth/signup/simple.post.ts
index 9f11f92..c9e4c94 100644
--- a/server/api/v1/auth/signup/simple.post.ts
+++ b/server/api/v1/auth/signup/simple.post.ts
@@ -84,7 +84,7 @@ export default defineEventHandler<{
         user: true,
       },
     }),
-    prisma.invitation.delete({ where: { id: user.invitation } }),
+    prisma.invitation.deleteMany({ where: { id: user.invitation } }),
   ]);
 
   await userStatsManager.addUser();
diff --git a/server/api/v1/client/saves/[gameid]/[slotindex]/index.delete.ts b/server/api/v1/client/saves/[gameid]/[slotindex]/index.delete.ts
index 0f36008..a055dd4 100644
--- a/server/api/v1/client/saves/[gameid]/[slotindex]/index.delete.ts
+++ b/server/api/v1/client/saves/[gameid]/[slotindex]/index.delete.ts
@@ -38,16 +38,14 @@ export default defineClientEventHandler(
     if (!game)
       throw createError({ statusCode: 400, statusMessage: "Invalid game ID" });
 
-    const save = await prisma.saveSlot.delete({
+    const { count } = await prisma.saveSlot.deleteMany({
       where: {
-        id: {
-          userId: user.id,
-          gameId: gameId,
-          index: slotIndex,
-        },
+        userId: user.id,
+        gameId: gameId,
+        index: slotIndex,
       },
     });
-    if (!save)
+    if (count == 0)
       throw createError({ statusCode: 404, statusMessage: "Save not found" });
   },
 );
diff --git a/server/api/v1/notifications/[id]/index.delete.ts b/server/api/v1/notifications/[id]/index.delete.ts
index ac60839..c47b106 100644
--- a/server/api/v1/notifications/[id]/index.delete.ts
+++ b/server/api/v1/notifications/[id]/index.delete.ts
@@ -20,14 +20,14 @@ export default defineEventHandler(async (h3) => {
     userIds.push("system");
   }
 
-  const notification = await prisma.notification.delete({
+  const { count } = await prisma.notification.deleteMany({
     where: {
       id: notificationId,
       userId: { in: userIds },
     },
   });
 
-  if (!notification)
+  if (count == 0)
     throw createError({
       statusCode: 400,
       statusMessage: "Invalid notification ID",
diff --git a/server/api/v1/user/token/[id]/index.delete.ts b/server/api/v1/user/token/[id]/index.delete.ts
index 54d1be1..2f0d473 100644
--- a/server/api/v1/user/token/[id]/index.delete.ts
+++ b/server/api/v1/user/token/[id]/index.delete.ts
@@ -13,10 +13,10 @@ export default defineEventHandler(async (h3) => {
       statusMessage: "No id in router params",
     });
 
-  const deleted = await prisma.aPIToken.delete({
+  const { count } = await prisma.aPIToken.deleteMany({
     where: { id: id, userId: userId, mode: APITokenMode.User },
   })!;
-  if (!deleted)
+  if (count == 0)
     throw createError({ statusCode: 404, statusMessage: "Token not found" });
 
   return;
diff --git a/server/internal/clients/handler.ts b/server/internal/clients/handler.ts
index 960dd55..6b7da5f 100644
--- a/server/internal/clients/handler.ts
+++ b/server/internal/clients/handler.ts
@@ -185,15 +185,19 @@ export class ClientHandler {
   }
 
   async removeClient(id: string) {
+    const client = await prisma.client.findUnique({ where: { id } });
+    if (!client) return false;
     const ca = useCertificateAuthority();
     await ca.blacklistClient(id);
 
+    // eslint-disable-next-line drop/no-prisma-delete
     await prisma.client.delete({
       where: {
         id,
       },
     });
     await userStatsManager.cacheUserStats();
+    return true;
   }
 }
 
diff --git a/server/internal/library/index.ts b/server/internal/library/index.ts
index 0e6f0de..4c5b54c 100644
--- a/server/internal/library/index.ts
+++ b/server/internal/library/index.ts
@@ -378,12 +378,10 @@ class LibraryManager {
   }
 
   async deleteGameVersion(gameId: string, version: string) {
-    await prisma.gameVersion.delete({
+    await prisma.gameVersion.deleteMany({
       where: {
-        gameId_versionName: {
-          gameId: gameId,
-          versionName: version,
-        },
+        gameId: gameId,
+        versionName: version,
       },
     });
 
@@ -391,12 +389,12 @@ class LibraryManager {
   }
 
   async deleteGame(gameId: string) {
-    await prisma.game.delete({
+    await prisma.game.deleteMany({
       where: {
         id: gameId,
       },
     });
-    gameSizeManager.deleteGame(gameId);
+    await gameSizeManager.deleteGame(gameId);
   }
 
   async getGameVersionSize(
diff --git a/server/internal/news/index.ts b/server/internal/news/index.ts
index 00725eb..694ff26 100644
--- a/server/internal/news/index.ts
+++ b/server/internal/news/index.ts
@@ -124,7 +124,10 @@ class NewsManager {
   }
 
   async delete(id: string) {
-    const article = await prisma.article.delete({
+    const article = await prisma.article.findUnique({ where: { id } });
+    if (!article) return false;
+    // eslint-disable-next-line drop/no-prisma-delete
+    await prisma.article.delete({
       where: { id },
     });
     if (article.imageObjectId) {
diff --git a/server/internal/objects/fsBackend.ts b/server/internal/objects/fsBackend.ts
index aedab6a..e6f58ec 100644
--- a/server/internal/objects/fsBackend.ts
+++ b/server/internal/objects/fsBackend.ts
@@ -259,16 +259,10 @@ class FsHashStore {
    */
   async delete(id: ObjectReference) {
     await this.cache.remove(id);
-
-    try {
-      // need to catch in case the object doesn't exist
-      await prisma.objectHash.delete({
-        where: {
-          id,
-        },
-      });
-    } catch {
-      /* empty */
-    }
+    await prisma.objectHash.deleteMany({
+      where: {
+        id,
+      },
+    });
   }
 }
diff --git a/server/internal/screenshots/index.ts b/server/internal/screenshots/index.ts
index b41ac03..6035d69 100644
--- a/server/internal/screenshots/index.ts
+++ b/server/internal/screenshots/index.ts
@@ -53,12 +53,16 @@ class ScreenshotManager {
    * @param id
    */
   async delete(id: string) {
-    const deletedScreenshot = await prisma.screenshot.delete({
+    const screenshot = await prisma.screenshot.findUnique({ where: { id } });
+    if (!screenshot) return false;
+    // eslint-disable-next-line drop/no-prisma-delete
+    await prisma.screenshot.delete({
       where: {
         id,
       },
     });
-    await objectHandler.deleteAsSystem(deletedScreenshot.objectId);
+    await objectHandler.deleteAsSystem(screenshot.objectId);
+    return true;
   }
 
   /**
diff --git a/server/internal/session/db.ts b/server/internal/session/db.ts
index 5b8fd2e..de23a4c 100644
--- a/server/internal/session/db.ts
+++ b/server/internal/session/db.ts
@@ -43,12 +43,12 @@ export default function createDBSessionHandler(): SessionProvider {
     },
     async removeSession(token) {
       await cache.remove(token);
-      await prisma.session.delete({
+      const { count } = await prisma.session.deleteMany({
         where: {
           token,
         },
       });
-      return true;
+      return count > 0;
     },
     async cleanupSessions() {
       const now = new Date();
diff --git a/server/internal/userlibrary/index.ts b/server/internal/userlibrary/index.ts
index 16db484..996ad3f 100644
--- a/server/internal/userlibrary/index.ts
+++ b/server/internal/userlibrary/index.ts
@@ -101,19 +101,16 @@ class UserLibraryManager {
 
   async collectionRemove(gameId: string, collectionId: string, userId: string) {
     // Delete if exists
-    return (
-      (
-        await prisma.collectionEntry.deleteMany({
-          where: {
-            collectionId,
-            gameId,
-            collection: {
-              userId,
-            },
-          },
-        })
-      ).count > 0
-    );
+    const { count } = await prisma.collectionEntry.deleteMany({
+      where: {
+        collectionId,
+        gameId,
+        collection: {
+          userId,
+        },
+      },
+    });
+    return count > 0;
   }
 
   async collectionCreate(name: string, userId: string) {
@@ -133,12 +130,13 @@ class UserLibraryManager {
   }
 
   async deleteCollection(collectionId: string) {
-    await prisma.collection.delete({
+    const { count } = await prisma.collection.deleteMany({
       where: {
         id: collectionId,
         isDefault: false,
       },
     });
+    return count > 0;
   }
 }