Error registering trigger Field_Pre_Generic_Trigger for Account Number

Issue:

After upgrading, you get the following error message in the Account Maintenance window.

Error registering trigger Field_Pre_Generic_Trigger for 'Account Number' of window 'GL_Account_Maintenance' of form 'GL_Account_Maintenance'. 
Error code 4.

Cause:

As of Version 9.0, Dynamics GP changed the name of the Account Number field to Account Number CS.

Resolution:
Open the Audit Group you use to audit the Account Number field. Open the audit and unmark the Account Number field and mark the Account Number CS field instead.