0	RESERVED	Reserved
1	REQUEST_ACCEPTED	Request accepted (success)
2	MORE_USAGE_REPORT_TO_SEND	More Usage Report to send
64	REQUEST_REJECTED	Request rejected (reason not specified)
65	SESSION_CTX_NOT_FOUND	Session context not found
66	MANDATORY_IE_MISSING	Mandatory IE missing
67	CONDITIONAL_IE_MISSING	Conditional IE missing
68	INVALID_LENGTH	Invalid length
69	MANDATORY_IE_INCORRECT	Mandatory IE incorrect
70	INVALID_FORW_POLICY	Invalid Forwarding Policy
71	INVALID_F_TEID_ALLOC_OPTION	Invalid F-TEID allocation option
72	NO_ESTABLISHED_PFCP_ASSOC	No established PFCP Association
73	RULE_CREATION_MOD_FAILURE	Rule creation/modification Failure
74	PFCP_ENTITY_IN_CONGESTION	PFCP entity in congestion
75	NO_RESOURCES_AVAILABLE	No resources available
76	SERVICE_NOT_SUPPORTED	Service not supported
77	SYSTEM_FAILURE	System failure
78	REDIRECTION_REQUESTED	Redirection Requested
79	ALL_DYNAMIC_ADDRESSES_ARE_OCCUPIED	All dynamic addresses are occupied