This read-write RowStatus governs the single global QoS mode configuration entry, and per its own description only the value active is acceptable since just one entry can exist. It matters as a formality of the MIB's table-based design, confirming the mode-configuration row exists and is active rather than allowing it to be created or destroyed like a normal multi-row table. For example, management software reading this object would expect to always see active, and would treat any other value as an anomaly given the current single-entry implementation.