phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '918d26ce567c9b3fbf3e07ac2c49c88b' 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 ('918d26ce567c9b3fbf3e07ac2c49c88b', -1, 1769599384, 1769599384, 'd849d8d0', -4, 0, 0)

Line : 187
File : sessions.php