phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c266a18e455715a0f0ed17fac73e1bfd' 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 ('c266a18e455715a0f0ed17fac73e1bfd', -1, 1762694855, 1762694855, 'd849d82e', -9, 0, 0)

Line : 187
File : sessions.php