There's a lot of incorrect data floating around, but then again, that's not really a problem limited to Experian (I've seen it with all credit reporting agencies), and it's not even limited to private entities. I would even say that it's less of a concern when it comes to the ramifications. About 15 years ago the police showed up at my parents' house looking for "me", and as it was a Friday evening, it took until Tuesday before it transpired, after my mother went to the courthouse in befuddlement, that due to a clerical error of some sort, somehow the LA Sheriff's Office looking to serve a failure to appear warrant on someone whose name is similar to mine but otherwise did not match my age, SSN, or anything else ended up getting served to me, and out of sheer dumb luck it happened during winter break, whereas 49 out of 52 weeks of the year I'd be 3000 miles away at school or 6000 miles away doing fieldwork. The confusion was already apparent by Monday because I spent the whole day in a holding cell with 30 other people at the courthouse and was promptly shuttled back to the Twin Towers jail with zero explanation, and it took literally Tuesday night around 11:30pm, after 3 hours of sitting on a bench, handcuffed, in silence for no discernable reason except that they can. In the interim, I did not have access to medication that I needed and quickly fell into medical distress that was entirely ignored. Luckily I didn't have a seizure, but that easily could have happened. A little bit of due diligence would have prevented this, and if I had a seizure the lawyers I consulted at the time said that I may be able to bring a claim against the sheriffs, but since I didn't, it didn't matter.
Except that I did end up going to law school, and during my internships, which was extensive (your local public defender's office can absolutely use a law student who is tech/code literate, and attorneys and judges absolutely notice when you appear every afternoon if you treat the whole endeavor as less grad school but more trade school), it turned out that data error of some sort that resulted in some sort of loss of liberty, however temporary, is common enough that I'd say between 1-2% of bond hearings involved a case of mistaken identity. Bond hearing is the first opportunity for the defendant to face a judge and while the percentage is obviously low, misdemeanor bond hearing dockets are cattle-calls and a public defender and intern would be sorting and prepping between 30 to 100 individuals (higher after holiday weekends) usually in the span of 2 hours, every single day the court is in session. I didn't go to law school in CA and the demographics are pretty dissimilar, but the sort of error and the ramifications are striking in similarity. It adds up pretty quickly.
Then leveraging my experience and language skills, I ended up moving into immigration removal defense at a private firm a few years later and as it turned out, ICE had data errors that, at least during the mid-Obama years, was even more prevalent, except immigration enforcement is administrative law, not criminal law, and federal administrative law, by virtue of its non-inclusion in the Constitution (who knew Jefferson and Madison could not literally see into the future, eh?), allowed for far more shenanigans with far fewer tangible consequences and most importantly, no entitlement to counsel except very narrow and exceptional circumstances, and in 1 circuit only (9th Cir, cases where the detained had severe mental disabilities). And then I began to see cases of US citizens, who are not subject to immigration enforcement, getting detained on administrative grounds and unable to get themselves out of the situation because administrative agencies almost never act in the capacity that places someone in non-judicial detention, except immigration enforcement (ICE/CBP, basically). Since it was not a judicial matter, there's no allegation of a crime, and without protections afforded by the Constitution or access to counsel, ICE was removing US citizens who had paperwork (that they would regard as false) and an abbreviated version of due process in immigration "court". I still don't know how they determine where to remove US citizens to, since some are native-born and some derived their citizenship from parentage, both requiring no paperwork since it doesn't involve naturalization. The US does not have a national ID system that is mandatory (non-citizens can get SSNs of course and many Americans do not have passports, and almost nobody routinely carries their birth certificate on them, which ICE routinely ignores anyway even if you manage to produce one). Immigration court proceedings do catch a number of erroneous detention cases, but we really can only rely on limited datasets to determine how many US citizens get removed to god-knows-where. Generally you'd have to make it back into the country to even make your case known to attorneys. Catholic Charities is probably the largest immigration legal service provider in terms of size and scale in this country by virtue of them being present just about everywhere and colleagues there sharing anectodal experience say that the number is "higher than anybody should be comfortable with", but there's so little transparency or accountability that the only thing that's certain is that it happens often enough that if you practice in this niche it's likely that you'll see cases, and there's very little that could be done to hold the agency accountable.
Oh, and somehow my erroneous arrest ended up requiring me to explain to the state bar even though it is not linked to any actual case since it was an actual case of mistaken identity/lack of due diligence. It might still be in the system somewhere. Although it doesn't affect me today in any meaningful way, thanks to the kafkaesque system we have, having even an erroneous record of jumping an NYC turnstile, and afaik only an NYC turnstile (unless there's a subway system elsewhere in NY state), is sufficient for a legal non-citizen to face removal proceedings, thanks to careless wording and judicial deference and intentional congressional vagueness in statutory wording and New York State's shambolic legislative system unable or willing to alter the otherwise inconsequential nomenclature of the law. Small data errors can and have literally led to the upending of lives. I guess when there's a potential Sword of Damocles hanging over just about everyone, it's almost comforting to know that most of the time database errors only lead to small inconveniences in the grand scheme of things.