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 ('557da8b8bcbeaed2b05461d3bb5af3f3', -1, 1511285566, 1511285566, '369c5cf3', -10, 0, 0)

Line : 172
File : sessions.php