fix (Transformation): changed error message to be clearer

Co-authored-by: Andre Sailer <[email protected]>

src/DIRAC/TransformationSystem/DB/TransformationDB.py

@@ -200,7 +200,7 @@ def addTransformation(
             if key in escapable_columns:
                 res = self._escapeString(params[key])
                 if not res["OK"]:
-                    return S_ERROR(f"Could not escape parameter {key}")
+                    return S_ERROR(f"Could not escape value for parameter {key}")
                 params[key] = res["Value"]
         # In an ideal world we would not do this at all, in favour of prepared statements or statement parameters.
         req = f"INSERT INTO Transformations ({', '.join(params)}) VALUES ({', '.join(params.values())});"