& is the reference distr. center; the value will be replaced by a blank

What causes this issue?

You have entered the number of the reference distribution center as the
distribution center. If you maintain this reference distribution
center, your changes will automatically be transferred to all other
distribution centers that have not already been maintained differently.
Since you normally maintain the reference distribution center by not
entering a value for the distribution center, the reference
distribution center will be replaced by a blank when you choose
<LS>Enter</>.
<ZH>Note</>
In retail material maintenance, not entering any organizational levels
generally means that the corresponding reference is maintained. The
organizational levels also remain blank in the header of the respective
data screens.
If the distribution center is blank in the header of the corresponding
logistics screen, the data is maintained for the reference distribution
center.

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?

Error message extract from SAP system. Copyright SAP SE.