Is it forbidden to delay the marriage contract due to studies after a long engagement period?

There is no harm in delaying the marriage contract, even if the engagement period is long. However, it is preferable for the period not to be prolonged for those who are able to marry, because its length may lead to problems between the two parties and may hinder the life of the engaged man and woman. It is also preferable not to delay the marriage contract on the pretext of studying.