Some celebration due.
Let's hope that the temperature profile from the impact and explosion was sufficient to sterilise the probe. However, we've already dumped enough microbes on Mars to make it certain that we're going to find life somewhere on Mars.
I know that great care is taken to try and build the landers aseptically, but since they're not prepared to actually sterilise them*, it's inevitable that Mars is being inoculated with Terrestrial microbes. Maybe we shouldn't be dropping landers on Mars until we've thoroughly thought through the consequences? Well, we're just human, so I don't think that's going to happen.
*Okeh, it's a hard call to build a working lander that would allow you to sterilise the whole caboodle, no matter how inaccessible the interior. For example, you could use steam for 15 minutes at 121 C, dry heat for 3 hours at 160 C, a high concentration of ozone or ethylene oxide for a couple of hours, or tens of kGy of gamma radiation.