phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c5f9f2cf8e2aab8c121ecc9160a827ca' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c5f9f2cf8e2aab8c121ecc9160a827ca', -1, 1758152725, 1758152725, 'd849d822', 5, 0, 0)

Line : 187
File : sessions.php