Variable not automatically summarized in table

Hello everybody!

I am still quite new to power BI and i have recently encountered a relatively serious setback whenever I tried to add the variable 'code_name' to a table. Problem is: whenever I insert this variable into a table, it lists the interity of the data from that column (so over 7000 samples code names). I have tried to activated and deactivate the function 'Show elements without data', but it didn't change anything whether it was activated or not. I have also checked the relations and everything seems to make sense. I am confused.

Thank you in advance for the help.