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 ('a8e49bc9a1473b8a7a4eeb8e1f2f8c97', -1, 1527413155, 1527413155, '36a7d8ef', -4, 0, 0)

Line : 187
File : sessions.php