diff --git a/src/generate.ts b/src/generate.ts
index d21e578c..058cb949 100644
--- a/src/generate.ts
+++ b/src/generate.ts
@@ -8,7 +8,7 @@ import { argsType } from './handlers/args-type';
 import { combineScalarFilters } from './handlers/combine-scalar-filters';
 import { createAggregateInput } from './handlers/create-aggregate-input';
 import { emitSingle } from './handlers/emit-single';
-import { beforeGenerateFiles, generateFiles } from './handlers/generate-files';
+import { generateFiles } from './handlers/generate-files';
 import { inputType } from './handlers/input-type';
 import { modelData } from './handlers/model-data';
 import { modelOutputType } from './handlers/model-output-type';
@@ -54,7 +54,6 @@ export async function generate(
     eventEmitter.on('AggregateOutput', createAggregateInput);
     eventEmitter.on('InputType', inputType);
     eventEmitter.on('ArgsType', argsType);
-    eventEmitter.on('BeforeGenerateFiles', beforeGenerateFiles);
     eventEmitter.on('GenerateFiles', generateFiles);
 
     const config = createConfig(generator.config);
diff --git a/src/handlers/generate-files.ts b/src/handlers/generate-files.ts
index e27211f6..961147e7 100644
--- a/src/handlers/generate-files.ts
+++ b/src/handlers/generate-files.ts
@@ -9,15 +9,15 @@ import {
 import { ImportDeclarationMap } from '../helpers/import-declaration-map';
 import { EventArguments } from '../types';
 
-export function beforeGenerateFiles(args: EventArguments) {
-    const { config, project, output } = args;
+export async function generateFiles(args: EventArguments) {
+    const { project, config, output, eventEmitter } = args;
 
     if (config.emitSingle) {
         const rootDirectory =
             project.getDirectory(output) || project.createDirectory(output);
         const sourceFile =
             rootDirectory.getSourceFile('index.ts') ||
-            rootDirectory.createSourceFile('index.ts');
+            rootDirectory.createSourceFile('index.ts', undefined, { overwrite: true });
         const statements = project.getSourceFiles().flatMap(s => {
             if (s === sourceFile) {
                 return [];
@@ -105,10 +105,6 @@ export function beforeGenerateFiles(args: EventArguments) {
             statements: [...imports.toStatements(), ...enums, ...classes],
         });
     }
-}
-
-export async function generateFiles(args: EventArguments) {
-    const { project, config, output, eventEmitter } = args;
 
     if (config.emitCompiled) {
         project.compilerOptions.set({
diff --git a/src/helpers/factory-get-source-file.ts b/src/helpers/factory-get-source-file.ts
index 5279e7ec..d626519c 100644
--- a/src/helpers/factory-get-source-file.ts
+++ b/src/helpers/factory-get-source-file.ts
@@ -22,6 +22,9 @@ export function factoryGetSourceFile(args: {
         });
         filePath = `${output}/${filePath}`;
 
-        return project.getSourceFile(filePath) || project.createSourceFile(filePath);
+        return (
+            project.getSourceFile(filePath) ||
+            project.createSourceFile(filePath, undefined, { overwrite: true })
+        );
     };
 }
diff --git a/src/test/generate.spec.ts b/src/test/generate.spec.ts
index 8c90e739..c547bd2f 100644
--- a/src/test/generate.spec.ts
+++ b/src/test/generate.spec.ts
@@ -1090,6 +1090,35 @@ describe('get rid of atomic number operations', () => {
     });
 });
 
+describe('noAtomicOperations with emitSingle and combineScalarFilters', () => {
+    before(async () => {
+        ({ project, sourceFiles } = await testGenerate({
+            schema: `
+            model User {
+              id String @id
+              age Int
+            }
+            `,
+            options: [
+                `outputFilePattern = "{name}.{type}.ts"`,
+                `noAtomicOperations = true`,
+                `emitSingle = true`,
+                `combineScalarFilters = true`,
+            ],
+        }));
+    });
+
+    it('FieldUpdateOperationsInput should not exists', () => {
+        const s = testSourceFile({
+            project,
+            file: 'index.ts',
+        });
+
+        const classDeclaration = s.sourceFile.getClass('IntFieldUpdateOperationsInput');
+        expect(classDeclaration).toBeUndefined();
+    });
+});
+
 describe('combine scalar filters', () => {
     before(async () => {
         ({ project, sourceFiles } = await testGenerate({