With SU mgmt, strat.I together with mixed stor. A or X not allowed

What causes this issue?

If the Storage Unit Management function is active, the system
determined
Putaway strategy "I" (addition to existing stock) and
Mixed storage "A" (bin) or "X" (no limitation)
This combination does not make sense.

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?

Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.