id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
29783	Add app_label validation to showmigrations	Junyoung_Choi	Junyoung_Choi	"#29469
#29518
#29506

The app label validation was added to some commands as above tickets.
But `showmigrations` command doesn't contain it.
So I think the validation should be added to `showmigrations` command.
"	Cleanup/optimization	closed	Core (Management commands)	dev	Normal	fixed			Accepted	1	0	0	1	0	0