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 ('ad31e22d0b7c0412c59cb020362346b5', -1, 1503379757, 1503379757, '365c8ec6', 1, 0, 0)

Line : 189
File : sessions.php