You cannot deactivate business function LOG_EAM_CI_6

What causes this issue?

You want to deactivate the business function <ZK>Enterprise Asset
Management Part 6</> (LOG_EAM_CI_6) in your system. This is not possible
if you use maintenance strategies or maintenance plans whose call
horizons have been defined in days or working days.

System Response

This is an error message. Since defining call horizons in days or
working days is only possible if business function LOG_EAM_CI_6 is
activated and some call horizons in your maintenance strategies or plans
have already been defined in days or working days, you can no longer
deactivate this business function.

How to fix this error?

In all the maintenance strategies and maintenance plans you use, define
the call horizons in percent instead of days/working days. You can then
deactivate this business function.

Error message extract from SAP system. Copyright SAP SE.