Related question - Which word is correct, “existed”, “existent” or “existing” - has an answer that claims that
"existent" would evoke the sense of existence which is related to philosophy and life in general
But in a dictionary I've seen an example:
The report is based on inputs from LDCs and their development partners, including their existent reports.
It is not related to philosophy, isn't it. Is my dictionary wrong, and it is better to say "including their existing reports"?
Update:
This answer presumes that there could be a typo, and the word is "extant", not "existent".