How to update the assigned solicitor's type in import

Answer:

Create a constituent query of constituents whose assigned solicitor type need to be updated.
Create an export which uses the query above.
Export the following fields:
Constituent Information, Import ID (In the Constituent Solicitor Import this field will need to be linked to Constituent Import ID)
Relationships, Assigned Solicitors, Import ID (In the Constituent Solicitor Import this field will need to be linked to Solicitor Relationship Import ID)
Relationships, Assigned Solicitors, Type (In the Constituent Solicitor Import this field will need to be linked to Type)
Relationships, Assigned Solicitors, Solicitor Constituent Record, Import ID (In the constituent solicitor import, this field needs to be linked to the solicitor link.)

Create a new constituent, solicitor import. Use mapping listed above on the Fields tab in Import.