If you want to import a Support Package in a system for which you have already scheduled an upgrade, you have to ensure that the target release of the planned upgrade has at least the equivalent Support Package level as the source release.

When you import a current Support Package in the source release and the target release does not have the equivalent Support Package level, corrections of program errors and changes to the ABAP Dictionary may be missing in the target release. In a worst-case scenario, this may cause loss of data during the upgrade.

For more information, see SAP Note 832594 .