phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9c7c97ad54268d4699c9a6d154f7c511' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9c7c97ad54268d4699c9a6d154f7c511', -1, 1760128597, 1760128597, 'd849d802', 21, 0, 0)

Line : 187
File : sessions.php