PostgreSQL: 23503 insert or update on table violates foreign key constraint
error: insert or update on table "orders" violates foreign key constraint "orders_user_id_fkey" DETAIL: Key (user_id)=(usr_99) is not present in table "users".
Immediate Remediation
bash
Verify parent entity exists prior to insertion or configure ON DELETE SET NULL / ON DELETE CASCADE in migration.
Root Cause Analysis
Encountered in PostgreSQL when standard configuration or runtime constraints are violated.
Verification & Guardrails
- Verify dependencies and runtime version compatibility.
- Ensure clean build artifact state.
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