If you have an FCS system, an FCS Support Package is the first Support Package in the queue. If it is missing from the queue, it cannot be defined. Instead, an error message tells you the name of the missing FCS Support Package. You cannot import an FCS Support Package into a non-FCS system (official delivery version).
Support Packages for a selected component are placed in the queue according to their sequence.
If Support Packages in the queue are related to Support Packages of another component (additional predecessor relationship, required CRTs), the queue is extended by additional Support Packages until all the predecessor relationships are fulfilled.
Make sure that the SAP Patch Manager takes into account the configuration of your SAP System and includes only those Support Packages in the queue that may be imported into your system.