3157092 - Error /FTI/WEBGUI_MSG031 in configuration "Event-Based WIP and Variance Posting"

Error /FTI/WEBGUI_MSG031 in configuration "Event Based WIP and Variance Posting"

SAP S/4HANA Cloud

When trying to assign Accounts to WIP Sources, enter the Sequential Number as '1', the system issues an error /FTI/WEBGUI_MSG031:
Invalid namespace for Sequential Number.

Sequence field allows 4 digits number, when you enter 1, for example, it is interpreted as 0001.
Number starts with '0' is considered as SAP Reserved numeric fields, which is a namespace restricted for SAP.

Maintain the sequence with 4 digits number, starts with 1.
For example, sequence 1001, then entries should be saved with no errors.

Invalid Namespace; /FTI/WEBGUI_MSG031; Event Based WIP and Variance Posting; SSCUI 103940. , KBA , CO-PC-OBJ-2CL , Cost Object Controlling (Public Cloud) , CO-PC-OBJ , Cost Object Controlling , Problem