phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c788efbf22938c9e7a210e7f0ffdf830' 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 ('c788efbf22938c9e7a210e7f0ffdf830', -1, 1738233374, 1738233374, '038118f0', -4, 0, 0)

Line : 187
File : sessions.php