CREATE TABLE master_techsheet_headers_backup (LIKE master_techsheet_headers INCLUDING ALL);


assign new sequnce for copied table
-- Step 1: Create new sequence
CREATE SEQUENCE master_techsheet_header_backup_id_seq START WITH 1 INCREMENT BY 1;

-- Step 2: Attach it to the id column
ALTER TABLE master_techsheet_header_backup 
    ALTER COLUMN id SET DEFAULT nextval('master_techsheet_header_backup_id_seq');

-- Step 3: Restart if needed
ALTER SEQUENCE master_techsheet_header_backup_id_seq RESTART WITH 1;