RE code of 4 given in error?

I was discharged in 06' with a RE code of 4 but never did anything illegal or immoral. Basically I had marital issues and psuhed to get out. Is it possible I recieved this code in error? Also is it possible to join the reserves with this code? My seperation code is JLK.
Update: Also I was General discharge
Update 2: OOPs i meant JFV
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