I imported the lookup file using the app Lookup Editor. The record of the column whose column name is only numbers was NaN. (Normal values are values such as 1A or 4A etc, but those values are all NaN after import)
Currently, we were able to update with the following measures. 1. Change the column name of only the numerical value of the file before import to a character string and import it. 2. After importing, change to the correct column name.
Since this correspondence is a provisional correspondence, I would like to solve the problem that the record changes to NaN.
Sorry, If there are people who know how to solve this problem, please reply.