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 ('b4b77fd92cb586da8eb957ab5d4e311d', -1, 1550592563, 1550592563, '22e2d0b9', 15, 0, 0)

Line : 189
File : sessions.php