Joe Jackson Wrongful Death Lawsuit Tossed Out of Court

2/21/2012 11:03 AM PST

Joe Jackson's Wrongful Death/Michael Jackson Lawsuit Tossed Out of Court

Joe Jackson screwed up by filing a Michael Jackson wrongful death lawsuit against AEG ... a judge has just ruled.

Joe filed his wrongful death lawsuit AFTER Katherine Jackson filed hers -- on her own behalf and on behalf of the kids.

It's unclear why Joe didn't try to join in Katherine's suit rather than filing a separate one on his own.  It's possible Katherine didn't want him.

Whatever the reason, the judge said you can't have 2 suits that allege the exact same thing, and since Katherine filed first Joe loses.

Joe could now try to horn in on Katherine's legal action -- if she'll let him.