This object is explicitly marked deprecated in its own description, with cienaCesMplsStaticIngressTunnelFixedTC named as its direct replacement. Seeing a nonzero, actively-referenced value here on an existing tunnel is a sign that configuration predates a software upgrade that introduced the newer object, and an admin auditing tunnel configuration should migrate reliance onto the FixedTC object rather than continuing to read or set this one. For example, a legacy value of 5 surviving here from before a platform upgrade should be cross-checked against, and eventually superseded by, the corresponding FixedTC value on the same tunnel.