User Creation Fails after Upgrade to version 5.1

[meshtask]

Hi,
I upgraded FusioPBX from version 4.3 to 5.1.
After upgrade i am not able to create new Users in FusionPBX.
Whenever i try to create new users, i get an error as below:

SELECT domain_uuid, contact_uuid, contact_type, contact_organization, contact_name_given, contact_name_family, contact_nickname FROM v_contacts WHERE contact_uuid = '62d30efa-18eb-4819-90ad-57bae1243f19';
Caught exception: SQLSTATE[25P02]: In failed sql transaction: 7 ERROR: current transaction is aborted, commands ignored until end of transaction block

SELECT domain_uuid, contact_uuid, contact_type, contact_organization, contact_name_given, contact_name_family, contact_nickname FROM v_contacts WHERE contact_uuid = '62d30efa-18eb-4819-90ad-57bae1243f19';