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 ('511f7d340c8a826d9f53d83e8c3b54eb', -1, 1519202814, 1519202814, '365a773b', 15, 0, 0)

Line : 189
File : sessions.php