Separate records after Deal Owner Name typo fix

Separate records after Deal Owner Name typo fix

One of our users in the CRM changed a typo in her name, more specifically a double space between first and last name fixed to only one space.

While we expected that the Deal Owner Name from all CRM tables would be changed to the correct version, instead both still exist. So some records still contain the old Deal Owner name and some the new, which causes a split of data in all of our records.

How can we correct this?