phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c5dd4ff0f294162689eb42c64db17bf0' 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 ('c5dd4ff0f294162689eb42c64db17bf0', -1, 1769285607, 1769285607, 'd849d814', -2, 0, 0)

Line : 187
File : sessions.php