Cisco Prime Error : Sending agent has become the new root of the Spanning Tree

[aslam.bajwa]

Hello all , 

i am using cisco prime 3.0 , recently i have replaced the distribution switch (4506E) after that i am getting major error on Access Switches connected with this Distribution Switch : 

Error : Sending agent has become the new root of the Spanning Tree

Error : A port transitions from Learning state to Forwarding state, or from Forwarding state to Blocking state

what could be the cause of this issue .

[essaalawadhi]

am facing the same issue,

what could be the cause of this issue .

[Gourmetcola2746237]

Spanning Tree Protocols