Was this latest meeting a disciplinary meeting or just a conversation to highlight areas of concern? If it was just informal, I wouldn't worry too much. Highlight that you do not recall any such meeting and advise that you have taken the concerns on board and will rectify going forward (if of course they are valid).
If it was a formal disciplinary meeting and you are worried that there may be further action as a result of it, then ask for all documentation that is being used to evidence the allegations of misconduct. Normally any previous warnings will not be taken into account after 12 months.
In cases of alleged misconduct, an investigation should be carried out to determine that the facts sufficiently support the case to be heard within a disciplinary hearing.
You should then be invited to a formal hearing, in which a disciplinary hearing manager will review this and determine any relevant mitigation. They will then make a decision as to whether the misconduct warrants a formal sanction such as a written warning. In my experience the only sanction that should be active, and could be considered during a recent disciplinary would be a final written warning which normally remains active for 12 months, you would need to check your companys policy to confirm that this is the case.
If within the following 12 month period you have then committed further misconduct, which again will need to be documented through an investigation and then subsequent disciplinary, then this previous written warning could be taken into account to contribute to the decision on the outcome of any disciplinary you are currently part of.
If this was just an informal conversation nearly a year ago that wasn't documented, then it cannot contribute towards a decision on any current misconduct allegations. If there have been some recent concerns, then the meeting may have just been a chance to informally address this with you before it gets to the stage where they need to look at disciplinary action. The HR Advisor may have been informed that someone had spoken to you previously and was pointing out that, as this had already been discussed, any expectations set should now have been implemented.
I appreciate different companies have different approaches to HR but they should have a policy and will need to follow that.