phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b608236bd8ec6b61a25a746f2d3a4d9f', -1, 1519416759, 1519416759, '36a74b1c', -2, 0, 0)

Line : 187
File : sessions.php