SAP Message C1801 - &: Value "&" not found

Diagnosis
The value you entered - &V2& - is not a valid value for thecharacteristic.
If you want to restrict the allowed values of a characteristic, therestricted allowed values must be within the range of the predefinedinterval.

Procedure
Correct the value.
Restrict the allowed values to an interval within the predefined allowedvalue.

594658BAPI_OBJCL_CHANGE: Value not found (C1801)
1187944.5A: Error message when you delete a valuation
158442Message C1801 '&: Value "&" not found'
1559662Unclear message: "Entry in field &1 required"