Salford City have parted company with joint-managers Anthony Johnson and Bernard Morley.
The news comes weeks after they sealed the Vanarama National League North title.
It was the third promotion under their charge in the past four seasons at the helm.
Salford say “irreconcilable differences” while the parties were attempting to agree new contracts led to the decision.
Owner Gary Neville said: “The last four seasons with the managers have been the most successful in the club’s history and a huge part of that is down to Anthony and Bernard, so this announcement is regrettable.
“However, after a meeting this morning between myself, senior management and the managers it was clear there were differences between us that could not be resolved, and it was therefore decided to part ways, and whilst this is disappointing, it is the right decision for all concerned.”
Johnson said: “Although we are naturally disappointed we felt the time was right. To go out on a high, after securing another promotion, makes us ready for the next challenge.
“We have had a great time at Salford City with a great set of players who have delivered what we asked and as a manager that is all you want.”
Morley added: “We have always given everything to the club and although we couldn’t come to an agreement on our future we would like to thank the club for the opportunities they have given us. The fans have been exceptional, and we will miss them but want to wish the club every success in the National League”.