Firstly You can't reset auto number.

But,

If you have access to the database, you can change the latest sequence number back to what you need.

But I don’t know what happens to existing data that is using a number higher than your new starting point.

Be careful with that.

Increasing the new starting number is easier.

You can just increase the default value to your new starting point.

Hi Bill Tong

You cannot set a autonumber back to 0. When you create a record using a "$RequestSteps/Sequence + 1" (when not using autonumber), you could end up in double sequence numbers when a second create has been fired, and the first record hasn't been committed. If the create is part of a big transaction, the double numbers would be more likely when more transactions are running at the same time.

When you're using an autonumber, you could save of the last sequencenumber in (for example in a separate entity) on when you press the "reset" button. when you create a new record, you should save the substracted number in a separate attribute, so you can always calculate the resulting sequence number (current sequencenumber - saved number) and you can keep track after which reset, the record has been created.

Hi Bill,

              You can't reset auto number.You can create a new attribute and include logic to reset the new attribute in the action button

example if some action happened then change the attribute value .