I guess it's fine.
Usually, the case numbers are the following:
07 – The US government
08 – The US government (dependent)
20 – Worker Not Elsewhere Specified
21 – Employment form
22 – Official status
23 – Entertainer
24 – Student
25 – Commuter
26 – National of a communist country
27 – Under application
28 – Under enforcement
29 – Refused application for permanent resident
52 – LMIA exempt
54 – Same employer or Subsequent open work permit
56 – Post Graduation work permit (PGWP)
57 – Live-in caregiver work permit
58 – International Experience Canada (IEC)
59 – Co-op work permit
86 – Others
98 – Seasonal worker
In my case, I should have received Case 56 but I received my work permit with Case 54, however, it's written "Any" on my work permit under the "Employer" category which means it's not a closed work permit. There are no additional conditions mentioned.