Resetting Serial Column Sequence Number

["Adam" <adam@xxxxxxxxxxxxxxxxxx>]

I just emptied my table and I want all my new inserts to start with a 'location_id' of '1'.  The table is named "locations" with a SERIAL column "location_id"

 

I tried the below SQL to rest the sequence ID but it's not working.  What am I doing wrong?

 

SELECT setval('locations_location_id_seq', (SELECT max(location_id) + 1 FROM locations));