What is the recoil energy of a nucleus produced in its first energy level?

[Adams2020]

Homework Statement

Using the data of Table, what is the recoil energy of a 17O nucleus produced in its first energy level?

Relevant Equations

...

Table:

To solve, using the conservation of energy:

E0=(m(deutron)+m(16O)-m(17O)-m(p))c^2
so:
E0=(2.014+15.994-16.999-1.008)931.5=0.93 MeV.
so using the conservation of energy:
14.95+0.93=16.62+0+E'
E'=- 0.74 MeV

But the energy sign has become negative. I also calculated for the first excited level, it was negative again. I do not know what is wrong.

 

[Charles Link]

I think you might need more accuracy in computing $E_o$.
I googled $m_p$ and got 1.0073.
For the deuteron I got 2.0135.
For O 16 I got 15.9949.
I think this makes the answer small but positive.