Resetting AUTOID field

How do I reset a field which has type AutoID to start again from count 1 after deleting all the records.Currently it starts from the next sequence.?   

AutoID field cannot be reset in a repository. This is an internally generated integer by MDM.
You will have to create a new repository using the schema of original repository for new set of Auto IDs starting from 1.

Ans2:Instead of creating new repository, just recreate the AutoID field. This will server your purpose it is not required to create the repository again