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 ('4f8400a8d6c6891ec96f0d53f745060f', -1, 1511299683, 1511299683, '36a6bc40', -4, 0, 0)

Line : 211
File : sessions.php