Section 21 6A sentence missing

Possession - Section 8 and Section 21

I have had this looked at by a solicitor and he has told me that there is a sentence missing from my section 21 6A. It is the sentence which says" This form has been changed to reflect new legislation which came into force on 26 March 2020 and should be used by Landlords in England up to 30 September 2020." Apart from this omitted sentence my Section 21 is correct and gave the correct three months notice period. Please can you tell me does this render my section 21 as invalid..? The solicitor says that it is unlikely that a court official would notice that the sentence is missing as all other details are correct. What is your view as I do not wish to proceed to court to find that it is all thrown out.... The solicitor said the correct law has been applied and the correct notice period given so it depends how PK my the court will be. Many thanks.