phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '907e188d8a903027739ff23b59d2f1e9' 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 ('907e188d8a903027739ff23b59d2f1e9', -1, 1762358794, 1762358794, 'd849d887', 4, 0, 0)

Line : 187
File : sessions.php