The Schedule wizard is use to check for errors on the flight legs. 

If you change Crew Complements or Aircraft equipment in the database, it can happen that it isn't picked up by the flight leg.

 

You will see the error in th right column.

 

In this example, the Aircraft qualification is missing.

Click the "Setup Complements" an the error will be corrected.

 

After that save the changes.

 

 

This option will adjust the manual changed complements, and correct them to the system default.