locking transaction until workflow end

Hi all,

With transaction CN22, when a user confirm a activity and save a network, workflow is lauched with "SWE_EVENT_CREATE_IN_UPD_TASK" with a BADI and a BEFORE_UPDATE method.

Everithing done well, except when user press CN22 too fast after the save. When this arrive, a lock appears and the BAPI call inside workflow fall in error.

So how can solve this issue ?

Thx.