diff --git a/prisma/migrations/20241018025544_update_constraints/migration.sql b/prisma/migrations/20241018025544_update_constraints/migration.sql
new file mode 100644
index 0000000..f229b84
--- /dev/null
+++ b/prisma/migrations/20241018025544_update_constraints/migration.sql
@@ -0,0 +1,23 @@
+-- DropForeignKey
+ALTER TABLE "QuotationPaySplit" DROP CONSTRAINT "QuotationPaySplit_quotationId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "QuotationPayment" DROP CONSTRAINT "QuotationPayment_quotationId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "RequestData" DROP CONSTRAINT "RequestData_employeeId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "RequestData" DROP CONSTRAINT "RequestData_quotationId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "QuotationPayment" ADD CONSTRAINT "QuotationPayment_quotationId_fkey" FOREIGN KEY ("quotationId") REFERENCES "Quotation"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "QuotationPaySplit" ADD CONSTRAINT "QuotationPaySplit_quotationId_fkey" FOREIGN KEY ("quotationId") REFERENCES "Quotation"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "RequestData" ADD CONSTRAINT "RequestData_employeeId_fkey" FOREIGN KEY ("employeeId") REFERENCES "Employee"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "RequestData" ADD CONSTRAINT "RequestData_quotationId_fkey" FOREIGN KEY ("quotationId") REFERENCES "Quotation"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 0e20a1a..a743cb4 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -1158,7 +1158,7 @@ model QuotationPayment {
   amount Float
   remark String?
 
-  quotation   Quotation @relation(fields: [quotationId], references: [id])
+  quotation   Quotation @relation(fields: [quotationId], references: [id], onDelete: Cascade)
   quotationId String
 }
 
@@ -1169,7 +1169,7 @@ model QuotationPaySplit {
   date   DateTime @db.Date
   amount Float
 
-  quotation   Quotation? @relation(fields: [quotationId], references: [id])
+  quotation   Quotation? @relation(fields: [quotationId], references: [id], onDelete: Cascade)
   quotationId String?
 }
 
@@ -1222,10 +1222,10 @@ model QuotationProductServiceWorker {
 model RequestData {
   id String @id @default(cuid())
 
-  employee   Employee @relation(fields: [employeeId], references: [id])
+  employee   Employee @relation(fields: [employeeId], references: [id], onDelete: Cascade)
   employeeId String
 
-  quotation   Quotation @relation(fields: [quotationId], references: [id])
+  quotation   Quotation @relation(fields: [quotationId], references: [id], onDelete: Cascade)
   quotationId String
 
   flow Json?