I have often seen wills where the printed date was, say, 2022 and the will was signed early in 2023, where the testator crossed out 2022 and substituted 2023 without this being witnessed. The Probate Registry never raised any query about this, as it was obvious that whoever had prepared the will had done so in 2022 but that the testator had not got around to signing it until early 2023. However, in your case the fact that the will was not signed until December 2023 might raise a query.