My column STUDENT[Grade] won’t reference the text value but it references the numeric value. In column STUDENT[Grade], it has grade 1-12, PK, and K. My reference column has app formula of [Student ID].[Grade], and it managed to reference all grade 1-12 but not “PK” and “K”. It shows “NaN” for grade “PK” and “K”. Please advise. Thank you.