There has been a few suggestions about the restriction where people cannot edit after one week but what about this? Having the Knowledge Base(only) free from this restriction? The Knowledge Base is a place where many people post Guides and such, why have it so they cannot edit the topic when they have aquired new information and wish to update it?
This section is more about guides and helping others than anything else, there shouldnt be any problems by letting this one section have no 1 week limit.
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