Is this a typo?
You get full tax (e.g. 42% in your case) and
PRSI relief (e.g. probably 6% in your case) on pension contributions up to the usual age related tax relief limits. If your bonus was paid via payroll into your pension then the full amount should have gone in and you have automatically received the full tax/
PRSI relief. You are not entitled to further relief. For example you don't get €1000 paid gross into your pension and receive 42% + 6% relief on other income since you have already received 42% + 6% relief on the bonus that went directly into your pension.
Post crossed with BRICKTOP's and s/he said it more concisely than me!