How To Fix VMP_MSG132 - Action cannot be performed; sub-assembly cannot be reassigned

SAP Error Message - Details

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 132

• Message text: Action cannot be performed; sub-assembly cannot be reassigned

What causes this issue?

You cannot drag and drop a second level assembly from planned panel on
an existing structure in the working panel.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.