100% of mid to large ERP upgrades go wrong
In some case, extremely expensively.
ERP upgrade projects are almost always objectively a failure for the organisation. It is not uncommon for many months, even an entire year of revenue to be lost because the new system wasn't ready in some significant way.
The potential improvements the system is sold on almost never appear, in many cases it becomes apparent that they could never have existed.
Really, the best an organisation can hope for is to survive an ERP upgrade.
And most of the reasons for this are because ERP vendors lock you in - forgetting that it also means upgrading is locked out.