Activity : Local PC crashed (NWDI actvity)

Hi Experts,

Guide me how to proceed for below case.

I had successfully created activity on my customer DC's, no problem in that. Now my local PC got crashed (Code/activity exist in that same PC without check-in), how to delete/ revert my open activates which are created in crashed PC ? Because of this it is not allowing as us create any other activity on the same DC's giving error message while creating the activity from other PC.

Please help me how i need to resolve this issue

Regards,

Satya.