SAPLV45U update vbap, very long run

Hello Experts,

We have a problem sometimes while updating a sales order through sales order bapi, bapi_sales_order_change.

in sm66 i see that:

30000(thirty  thousand) seconds passed since the update started and still it seems it is updating the vbap.

32000  Username         SAPLV45U          UPDATE             VBAP

This error occurs 3-4 times in a week.

Could you write about this issue ?

Thanks