Importing CSV doesn't work for field type Reference (empty)

[ritaMagerDev]

Describe the Bug
Importing CSV files does not work for fields with the Reference type; the imported data remains empty.

To Reproduce
Steps to reproduce the issue:

Navigate to a table page.
Click on Import.
Select a CSV file containing a column with reference-type data (e.g., /model/123qweasd12).
After importing, observe that the column for reference data is empty.