diff --git a/internal/postgres/source.go b/internal/postgres/source.go
index 1b013da..0e60a5e 100644
--- a/internal/postgres/source.go
+++ b/internal/postgres/source.go
@@ -16,7 +16,7 @@ func CreateSourceNode(ctx context.Context, db *gorm.DB, anthroveSource *pgModels
 		return fmt.Errorf("anthroveSource domain is required")
 	}
 
-	result := db.WithContext(ctx).Create(anthroveSource)
+	result := db.WithContext(ctx).Where(pgModels.Source{Domain: anthroveSource.Domain}).FirstOrCreate(anthroveSource)
 
 	if result.Error != nil {
 		return result.Error
diff --git a/internal/postgres/source_test.go b/internal/postgres/source_test.go
index 2bde71b..d0514c2 100644
--- a/internal/postgres/source_test.go
+++ b/internal/postgres/source_test.go
@@ -65,7 +65,7 @@ func TestCreateSourceNode(t *testing.T) {
 				db:             gormDB,
 				anthroveSource: validAnthroveSource,
 			},
-			wantErr: true,
+			wantErr: false,
 		},
 	}
 	for _, tt := range tests {
@@ -249,7 +249,7 @@ func checkSourceNode(got *pgModels.Source, want *pgModels.Source) bool {
 	if want == nil && got == nil {
 		return true
 	}
-	
+
 	if got.Domain != want.Domain {
 		return false
 	}