Conversion error for the data of entry &1

What causes this issue?

The system could not convert the input data for the secure storage to
the format required for internal processing.

System Response

The action was terminated.

How to fix this error?

If you can check the entry of the data yourself, check your entry.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.