Package & may not be deactivated; phase: &

What causes this issue?

You want to activate a package but another package is still active.
This can, however, only be deactivated if it is in the ANALYZE or READY
phase.

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?

Check why a package is active and carry out activation again
afterwards.

Error message extract from SAP system. Copyright SAP SE.