The maintenance statuses will not be changed in client &

What causes this issue?

The previous error message can occur if, when modifying your system, you
have defined your own maintenance statuses in addition to those in the
standard SAP system. It is then possible that the new maintenance
statuses (see program documentation) can no longer be fully assigned
since 15 maintenance statuses at most may be specified for each field.

System Response

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

How to fix this error?

View the current maintenance statuses of the fields concerned (table
T130F) and extend these maintenance statuses yourself as required. No
further response is required to this error during upgrading.

Error message extract from SAP system. Copyright SAP SE.