Problem with prior-posterior plot

Dear Professor Pfeifer,

Thank you reading this post.
I got the prior-posterior plot of exogenous shock as bellow after bayesian estimation, in which the posterior distribution seems a little strange. I’m not sure if it’s OK for me to use this result ? or I should do something to improve it ?

Thank you for your time.
Best regards

prior-posterior plot

Why do you think there is a problem? Your prior is incredibly tight so the y-axis is compressed. But the posterior is more fanned out and looks OK.