You can check your SAP systems inbound and outbound queues consistency status easily with two related report via transaction code SE38…
These two reports will find if there any inconsistency and delete them if you are not check “Check Only” selection area…
For INBOUND Queue Consistency Check ;
Go to SE38 and execute the report RSTRFCEH
For OUTBOUND Queue Consistency Check ;
Go to SE38 and execute the report RSTRFCEG