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
30434	DurationField silently drops negative sign	Ryan Govostes	nobody	"When a negative value, such as `-00:00:05` is written to a DurationField via the admin interface, the value is silently converted to `00:00:05`, dropping the negative.

There is no note in the documentation that this would be expected, and indeed it seems that #27699 was intended to support negative values for DurationFields on SQLite.

I've tried with both SQLite and PostgreSQL database backends."	Bug	closed	Database layer (models, ORM)	2.2	Normal	duplicate			Unreviewed	0	0	0	0	0	0