Inconsistent parameter effectivity

What causes this issue?

The network?s parameter effectivity was changed after the previous BOM
explosion. This could have been an attempt to reassign a network to a
more important model and unit.

System Response

The parameter effectivity in a network defines which end-item unit is
manufactured by the network. Parameter effectivity in the BOM defines
exceptions for individual end-item units. Parameter effectivity in the
BOM and in the network must match to ensure that the correct BOM items
are selected for an end-item.

How to fix this error?

Perform one of the following steps:
Re-explode the current BOM version, either in this app or by using
transaction <AB>CN33_N</>, to finalize the reassignment of the network.
Change the model and unit in the network using transaction <AB>CJ20N</>
to reverse the network reassignment.

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.