Cannot remove extension due to Generic Group Alert error

[synthesis]

Hello. I have been trying to remove an extension on the Mitel 3300 ICP via the web interface but I get the following error message: Deprogram Generic group alert programmed on it before deassigning acd set. I checked under "User and Services Configuration > Keys" and found that a Generic Group Alert was set on one of the keys so I deleted it then tried to remove the extension but still get the same error message. Would could be causing this issue?

[ZuluAlpha]

Can you uncheck the ACD Enabled box on the profile tab?

[synthesis]

Can you uncheck the ACD Enabled box on the profile tab?

I tried that but I get the same error message as before ("Deprogram Generic group alert programmed on it before deassigning acd set").

[august]

Have a look at the ACD Path or Skill Group.  The generic groupe alert should be there.  You will need to delete it.

[ZuluAlpha]

The user isn't logged in when you're trying to do that are they?

[synthesis]

Have a look at the ACD Path or Skill Group.  The generic groupe alert should be there.  You will need to delete it.

I checked the ACD Path and Skill Group forms but did not find it. Is it possible to locate where this number is being used using a maintenance command?

[synthesis]

The user isn't logged in when you're trying to do that are they?

No user is logged on since when dialing the number, the "Out of Service" message is shown.