Update src/main/resources/db_en.properties

Co-authored-by: Matthias Keck <[email protected]>

src/main/resources/db_en.properties

@@ -29,7 +29,7 @@ EntityDescriptor.cannotSaveEntity = Cannot save ${entity}: ${message}
 Property.emptyValue = <empty>
 Property.fieldNotNullable = The field '${field}' must not be empty.
 Property.fieldNotUnique = The value '${value}' is already in use for the field '${field}'.
-Property.fieldNotUniqueException = An object of type '${entity}' with the same values already exists: ${fieldValueSet} .
+Property.fieldNotUniqueException = An object of type '${entity}' with the same values already exists: ${fieldValueSet}.
 Property.fieldNotUpdatable = The field '${field}' must not be modified.
 Property.illegalValue = Invalid value '${value}' in field '${property}'.
 Property.parseValueErrorMessage = ${message}