phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7971f8ef1a2e6cddc8b1cff54f180a91' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7971f8ef1a2e6cddc8b1cff54f180a91', -1, 1765955872, 1765955872, '00000000', -9, 0, 0)

Line : 187
File : sessions.php