What was one of the reasons for the beginning of the era of palace coups in the 18th century?

In the history of Russia, palace coups are called the period in the 18th century, in which power passed from one ruler to another. The most compelling reason for this phenomenon was the decision made by Peter 1 on succession to the throne. In 1714 he issued a decree according to which power could be transferred not in a straight line, but at the request of the emperor. Also, a woman could become a monarch. This gave rise to contradictions in the Romanov family tree. The rulers could not stay in their place due to the inconsistency of the decisions made.