Organisations normally cannot have a first name, but some circumstances allow it. For example, data imports will not restrict first names against an organisation.
To fix this, changing the contact type is required:
Select More, then Change Contact Type.
Change the Contact Type to Individual.
Select Edit.
Click the Biographical tab and remove the first name.
After saving select More, then Change Contact Type.
Change the Contact Type back to Organisation.
If the contact type cannot be changed due to existing information stored against the record, please reach out to us via the Digital Assistant and provide us with as many details as possible so we can investigate and assist.