phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cafceb5dbe170613ebc2c3064f1876b2' 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 ('cafceb5dbe170613ebc2c3064f1876b2', -1, 1773436259, 1773436259, 'd849d834', -4, 0, 0)

Line : 187
File : sessions.php