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 ('9e5e0fff09fe1c2f6f97aa7e955d4373', -1, 1501066216, 1501066216, '365cb42e', 4, 0, 0)

Line : 187
File : sessions.php