SAP Message 8Z141 - Lock message: User & is using index maintenance or inflation program

Diagnosis
Another user is running one of the following transactions :
Define inflation indexes
Maintain inflation index values
Maintain composed indexes
Maintain active version
Inflation programs ( FI , FI-AA, MM, etc .. )
The system locked the entries to prevent the modification of a value
that is in use by another user.
Contact the user o wait until the system unlock the tables