As the Vatican press office announced on Friday, Wieslaw Smigiel (55) will become the new head of the archdiocese in north-west Poland, which is home to around one million Catholics.
The bishop's seat was vacant for more than six months.
Smigiel's predecessor Dziega had submitted his resignation to the Pope in February.
In a letter to the priests of the archdiocese, he cited his failing health as the reason.
In an unusual move, the Pope's ambassador to Poland, Archbishop Antonio Guido Filipazzi, then announced that Dziega had in fact resigned due to a failure of leadership in dealing with a clerical abuse offender.
An investigation into these events had previously been carried out on behalf of the Vatican.
Premature resignations in other dioceses too
Since a change to canon law in 2019, bishops can be forced to resign by the Pope if they have not fulfilled their duties in dealing with cases of abuse. This was laid down in a church law entitled"Vos estis lux mundi" (You are the light of the world).
The new Archbishop of Szczecin, Smigiel, had been Bishop of Torun (Thorn) in Pomerania since 2017. He was also interim administrator in the dioceses of Plock and Bydgoszcz, where the bishops had also resigned prematurely.
The former Bishop of Bydgoszcz also resigned due to the mishandling of abuse cases.