Common errors returned for a new request

Following is a list of common errors that you may encounter while creating a new request and how to mitigate them.

Error Message	Explanantion	Mitigation
code: RoleAssignmentExists message: The Role assignment already exists.	A similar role assignment already exists	You can GET this role assignment and verify its schedule.
code: RoleAssignmentRequestPolicyValidationFailed message: The following policy rules failed: ["ExpirationRule"]	The ScheduleInfo specified in the request exceeds the maximum allowed duration	You can GET the RoleManagementPolicy for this RoleDefinitionId and check the RoleManagementPolicyExpirationRule
code: RoleAssignmentRequestPolicyValidationFailed message: The following policy rules failed: ["JustificationRule"]	You need to specify a Justification in the request body	You can GET the RoleManagementPolicy for this RoleDefinitionId and check the RoleManagementPolicyEnablementRule
code: RoleAssignmentRequestPolicyValidationFailed message: The following policy rules failed: ["EligibilityRule"]	A valid RoleEligibilityScheduleInstance doesn't exist to activate this role	A resource admin needs to create a RoleEligibilityScheduleRequest for this principal
code: RoleAssignmentRequestPolicyValidationFailed message: The following policy rules failed: ["TicketingRule"]	You need to specify a TicketInfo in the request body	You can GET the RoleManagementPolicy for this RoleDefinitionId and check the RoleManagementPolicyEnablementRule
code: RoleAssignmentRequestPolicyValidationFailed message: The following policy rules failed: ["MfaRule"]	You need to complete Azure Multi-Factor Authentication to submit this request	You can GET the RoleManagementPolicy for this RoleDefinitionId and check the RoleManagementPolicyEnablementRule