phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'caf58c0f67c2043e6b8e35e75d70f4b3' 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 ('caf58c0f67c2043e6b8e35e75d70f4b3', -1, 1771105279, 1771105279, 'd849d88a', 2, 0, 0)

Line : 187
File : sessions.php