phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'bdec6ddbdc7b22e60a428da3d4a4ba11' 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 ('bdec6ddbdc7b22e60a428da3d4a4ba11', -1, 1770757473, 1770757473, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php