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 ('a3cce9d5d1fdf96b6fbca2d7c4f40303', -1, 1519479556, 1519479556, '36a71dd0', -6, 0, 0)

Line : 187
File : sessions.php