Why is Flash patch to 11.0.1.152 the "debug" version?

Why is Flash patch to 11.0.1.152 the "debug" version?

See patch IDs 300273 and 300274.
 
The location path says " flashplayer_11_plugin_debug_32bit.exe" and "flashplayer_11_ax_debug_32bit.exe"
 
Why are these the debug versions?

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