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 ('0afbc6b2f94b52e83e11c57eac02352c', -1, 1550316231, 1550316231, '36eb37fd', 20, 0, 0)

Line : 186
File : sessions.php