Are cyclic references supported?

[amacfie]

When table A has a foreign key to table B and table B has a foreign key to table A, sqlacodegen gives a warning at this line: SAWarning: Cannot correctly sort tables; there are unresolvable cycles between tables "tablea, tableb", which is usually caused by mutually dependent foreign key constraints. Foreign key constraints involving these tables will not be considered; this warning may raise an error in a future release.. Does this warning mean something won't work or can I ignore it?