You need to increase the spool number range in the system so you can create more spools without reaching a spool overflow
Increasing the spool range is described in the SAP note 48284:
48284 - System can no longer create spool requests
As described in note 48284, you can edit the spool range using transaction SNRO and this must be done in ** client 000 **
The maximum value for the spool range is 2 billion (mentioned in note 1953355 for example).
Some administrators ask about the parameters rspo/spool_id/max_number and rspo/spool_id/loopbreak. These parameters are not important anymore for increasing the spool range, you only need to follow the steps of note 48284.
You can run report RSPO_SHOW_SPO_NUM (in any client) to check your spool status.
You also have the monitor in transaction RZ20 -> SAP CCMS Monitor Templates -> Spool System -> System Wide -> SpoolNumbers -> UsedNumbers