It seems highly unlikely this would need to be disclosed in the suitability test as you paid off the debt with no legal processes started to reclaim the debt from you.
Thousands of lawyers will have missed a payment to their credit card who have been able to be admitted to the roll.
These are the aspects around financial conduct/events the SRA considers, so unless you missed 6 or more consecutive payments I don't think this is going to be an issue.
View attachment 6449