diff --git a/pkg/api/apierrors/errors.go b/pkg/api/apierrors/errors.go
index 82a91747d..ffaaca54f 100644
--- a/pkg/api/apierrors/errors.go
+++ b/pkg/api/apierrors/errors.go
@@ -19,6 +19,7 @@ import (
 const (
 	ErrInternal                = "INTERNAL"
 	ErrConflict                = "CONFLICT"
+	ErrTXID                    = "TXID_CONFLICT"
 	ErrInsufficientFund        = "INSUFFICIENT_FUND"
 	ErrValidation              = "VALIDATION"
 	ErrContextCancelled        = "CONTEXT_CANCELLED"
@@ -64,6 +65,8 @@ func coreErrorToErrorCode(c *gin.Context, err error) (int, string, string) {
 		ledger.IsScriptErrorWithCode(err, ErrScriptMetadataOverride):
 		scriptErr := err.(*ledger.ScriptError)
 		return http.StatusBadRequest, scriptErr.Code, EncodeLink(scriptErr.Message)
+	case ledger.IsTXIDError(err):
+		return http.StatusConflict, ErrTXID, ""
 	case errors.Is(err, context.Canceled):
 		return http.StatusInternalServerError, ErrContextCancelled, ""
 	case storage.IsError(err):
diff --git a/pkg/api/controllers/script_controller.go b/pkg/api/controllers/script_controller.go
index 6598487ba..aec310113 100644
--- a/pkg/api/controllers/script_controller.go
+++ b/pkg/api/controllers/script_controller.go
@@ -48,6 +48,9 @@ func (ctl *ScriptController) PostScript(c *gin.Context) {
 		case *ledger.ConflictError:
 			code = apierrors.ErrConflict
 			message = e.Error()
+		case *ledger.TXIDError:
+			code = apierrors.ErrTXID
+			message = e.Error()
 		default:
 			logging.FromContext(c.Request.Context()).Errorf(
 				"internal errors executing script: %s", err)
diff --git a/pkg/ledger/error.go b/pkg/ledger/error.go
index af633e822..9f4e8a849 100644
--- a/pkg/ledger/error.go
+++ b/pkg/ledger/error.go
@@ -100,6 +100,25 @@ func IsConflictError(err error) bool {
 	return errors.Is(err, &ConflictError{})
 }
 
+type TXIDError struct{}
+
+func (e TXIDError) Error() string {
+	return "conflict error on transaction id"
+}
+
+func (e TXIDError) Is(err error) bool {
+	_, ok := err.(*TXIDError)
+	return ok
+}
+
+func NewTXIDError() *TXIDError {
+	return &TXIDError{}
+}
+
+func IsTXIDError(err error) bool {
+	return errors.Is(err, &TXIDError{})
+}
+
 const (
 	ScriptErrorInsufficientFund  = "INSUFFICIENT_FUND"
 	ScriptErrorCompilationFailed = "COMPILATION_FAILED"
diff --git a/pkg/ledger/execute_txsdata.go b/pkg/ledger/execute_txsdata.go
index 1f0e218a4..ff0fe646f 100644
--- a/pkg/ledger/execute_txsdata.go
+++ b/pkg/ledger/execute_txsdata.go
@@ -162,6 +162,8 @@ func (l *Ledger) ExecuteTxsData(ctx context.Context, preview, checkBalances bool
 		switch {
 		case storage.IsErrorCode(err, storage.ConstraintFailed):
 			return []core.ExpandedTransaction{}, NewConflictError()
+		case storage.IsErrorCode(err, storage.ConstraintTXID):
+			return []core.ExpandedTransaction{}, NewTXIDError()
 		default:
 			return []core.ExpandedTransaction{}, errors.Wrap(err,
 				"committing transactions")
diff --git a/pkg/storage/errors.go b/pkg/storage/errors.go
index af07dfb74..698b7714b 100644
--- a/pkg/storage/errors.go
+++ b/pkg/storage/errors.go
@@ -13,6 +13,7 @@ type Code string
 
 const (
 	ConstraintFailed Code = "CONSTRAINT_FAILED"
+	ConstraintTXID   Code = "CONSTRAINT_TXID"
 	TooManyClient    Code = "TOO_MANY_CLIENT"
 )
 
diff --git a/pkg/storage/sqlstorage/flavor.go b/pkg/storage/sqlstorage/flavor.go
index 9e8c2da5d..cca392aef 100644
--- a/pkg/storage/sqlstorage/flavor.go
+++ b/pkg/storage/sqlstorage/flavor.go
@@ -56,6 +56,9 @@ func init() {
 		if errors.As(err, &pgConnError) {
 			switch pgConnError.Code {
 			case "23505":
+				if pgConnError.ConstraintName == "transactions_id_key" {
+					return storage.NewError(storage.ConstraintTXID, err)
+				}
 				return storage.NewError(storage.ConstraintFailed, err)
 			case "53300":
 				return storage.NewError(storage.TooManyClient, err)