Problem related to MotorGroup in Sardana

Last week there was a ticket in the issue-tracker related to MotorGroups in Sardana: Moving multiple motors from spock at once fails while moving individual motors still works

 
>  [48]: umv mot1 0 mot2 0 mot3 0 mot4 0
   An error occurred while running umv:
   PyDs_PythonError: Exception: A MotorGroup with name '_mg_ms_17456_1' already exists

Comment regarding the problem:

• A "MotorGroup" is a Tango Device created by Sardana on-the-fly and it should disappear from the Tango Database automatically, once the motion is finished
• With jive it can checked under Pool/MotorGroups
• In case this problem occurs one can try to: 1) delete the respective Tango Device manually from the Tango DB using jive or 2) run SardanaAIO to re-initialize the pool.