I do not understand why it is saying "you told us that you received a withdrawal of an excess traditional IRA contribution from2019" I do not know what this means.?

Did you mistakenly enter a zero in box 2a of a 1099-R form reporting a distribution from an IRA?  A Form 1099-R with code 1, 2 or 7 in box 7 and the IRA/SEP/SIMPLE box marked must always have box 2a equal to box 1 except in the rare case where you have obtained a distribution of an excess contribution after the due date of the tax return for the year for which the excess contribution was made.