How to Synchronize the ERPnext datebase with Other WareHouse Management System

Dear developers:
Our team are exhausted with the date-importing problem. We try to connect SAP to ERPnext with some date strategy. But more and more items flows into the ERPnext from SAP and other system like Transport Management System(TMS). Our ERPnext is Down.
Dear friends,do you have some strategies or idea to deal with this?