"On the tax form (Married filing jointly) entered '0' for Traditional and Roth IRA contribution for both."
That seems to be the problem. It appears that you failed to enter the traditional IRA contribution that you made.
To correct this you need to amend your 2024 tax return to include a correct Form 8606 and to add the small amount of taxable income. (Because the tax tables are stepwise, the small increase in taxable income may or may not increase your 2024 tax liability.)
For your 2025 tax return you'll either want to begin by importing the amended tax file or simply correct the amount of basis carried in from line 14 of the 2024 Form 8606.
To avoid such problems in the future, remember that a so-called backdoor Roth is actually two separate, largely independent transactions, a traditional IRA contribution and a Roth conversion. These two transactions only intersect on Form 8606 where the pro rata calculation of nontaxable taxable and taxable amounts is performed.
