Activation of account assignment elements in FM inconsistent with BCS

What causes this issue?

Activation of account assignment elements in FM is not consistent with
budgeting settings. The budgeting settings should not violate FM and
posting settings, which means:
account assignment elements which are not active in FM should not be
used in budgeting
account assignment elements which are "optional" in FM posting should
not be set to "mandatory" in budgeting
In addition, if grants are active in FM, the following rules should be
observed:
The fund should be active in FM and mandatory in budgeting
The grant should have the same status in posting and in budgeting (both
mandatory or both optional)
This mesage should only occur in an SAP System.
Budgeting settings are not user-dependent, whereas FM settings can be
user-specific in an SAP System (via table FMISPSUSER).
The status of account assignment elements for each FM area is normally
defined according to the specific settings of the FM area owner (which
could differ from yours). The warning will be issued for each FM area
belonging to a user which has other settings than yours in table
FMISPSUSER.

System Response

Within budgeting, the system will work with budgeting settings even if
they violate your FM posting settings. In other areas, FM and posting
settings have priority over budgeting.

How to fix this error?

If the message occurs during status maintenance for an account
assignment element:
for an FM area you are not working with, you can ignore it
for your own FM area, you should check the consistency of your user
settings with the budgeting status you defined according to the rules
described above.
If the message occurs in other transactions, you should check the
consistency of your user settings with the budgeting status you have
defined according to the rules described above.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.