[Opendnssec-user] Migrating from SoftHSM 1 to 2: "ERROR: Could not get the class of object 1. Continuing."

[Stephane Bortzmeyer]

I want to migrate an old installation, which still uses SoftHSMv1.

On the new machine, I initialized SoftHSM v2:

sudo softhsm2-util --init-token  --slot 0 --label OpenDNSSEC

But then migration fails:

 % sudo softhsm2-migrate --db /var/lib/softhsm/slot0.db --token OpenDNSSEC 
Found slot 1877891147 with matching token label.
=== User PIN (4-255 characters) ===
Please enter user PIN: ********************************
Please reenter user PIN: ********************************
ERROR: Could not get the class of object 1. Continuing.
ERROR: Could not get the class of object 2. Continuing.
ERROR: Could not get the class of object 3. Continuing.
ERROR: Could not get the class of object 4. Continuing.
ERROR: Could not get the class of object 41. Continuing.
ERROR: Could not get the class of object 42. Continuing.
ERROR: Could not get the class of object 51. Continuing.
ERROR: Could not get the class of object 52. Continuing.
ERROR: Could not get the class of object 55. Continuing.
ERROR: Could not get the class of object 56. Continuing.
ERROR: Could not get the class of object 89. Continuing.
ERROR: Could not get the class of object 90. Continuing.
ERROR: Could not get the class of object 191. Continuing.
ERROR: Could not get the class of object 192. Continuing.
ERROR: Could not get the class of object 193. Continuing.
ERROR: Could not get the class of object 194. Continuing.
ERROR: Could not get the class of object 219. Continuing.
ERROR: Could not get the class of object 220. Continuing.
ERROR: Could not get the class of object 237. Continuing.
ERROR: Could not get the class of object 238. Continuing.
ERROR: Could not get the class of object 239. Continuing.
ERROR: Could not get the class of object 240. Continuing.
ERROR: Could not get the class of object 241. Continuing.
ERROR: Could not get the class of object 242. Continuing.
ERROR: Could not get the class of object 243. Continuing.
ERROR: Could not get the class of object 244. Continuing.
ERROR: Could not get the class of object 245. Continuing.
ERROR: Could not get the class of object 246. Continuing.
ERROR: Could not get the class of object 247. Continuing.
ERROR: Could not get the class of object 248. Continuing.
ERROR: Could not get the class of object 249. Continuing.
ERROR: Could not get the class of object 250. Continuing.
ERROR: Could not get the class of object 251. Continuing.
ERROR: Could not get the class of object 252. Continuing.
ERROR: Could not get the class of object 253. Continuing.
ERROR: Could not get the class of object 254. Continuing.
ERROR: Could not get the class of object 255. Continuing.
ERROR: Could not get the class of object 256. Continuing.
ERROR: Could not get the class of object 257. Continuing.
ERROR: Could not get the class of object 258. Continuing.
ERROR: Could not get the class of object 259. Continuing.
ERROR: Could not get the class of object 260. Continuing.
ERROR: Could not get the class of object 261. Continuing.
ERROR: Could not get the class of object 262. Continuing.
ERROR: Could not get the class of object 263. Continuing.
ERROR: Could not get the class of object 264. Continuing.
ERROR: Could not get the class of object 265. Continuing.
ERROR: Could not get the class of object 266. Continuing.
ERROR: Could not get the class of object 267. Continuing.
ERROR: Could not get the class of object 268. Continuing.
ERROR: Could not get the class of object 269. Continuing.
ERROR: Could not get the class of object 270. Continuing.
ERROR: Could not get the class of object 271. Continuing.
ERROR: Could not get the class of object 272. Continuing.
ERROR: Could not get the class of object 273. Continuing.
ERROR: Could not get the class of object 274. Continuing.
ERROR: Could not get the class of object 275. Continuing.
ERROR: Could not get the class of object 276. Continuing.
ERROR: Could not get the class of object 277. Continuing.
ERROR: Could not get the class of object 278. Continuing.
ERROR: Could not get the class of object 279. Continuing.
ERROR: Could not get the class of object 280. Continuing.
ERROR: Could not get the class of object 281. Continuing.
ERROR: Could not get the class of object 282. Continuing.
ERROR: Could not get the class of object 283. Continuing.
ERROR: Could not get the class of object 284. Continuing.
ERROR: Could not get the class of object 285. Continuing.
ERROR: Could not get the class of object 286. Continuing.
ERROR: Could not get the class of object 287. Continuing.
ERROR: Could not get the class of object 288. Continuing.
ERROR: Could not get the class of object 289. Continuing.
ERROR: Could not get the class of object 290. Continuing.
ERROR: Could not get the class of object 291. Continuing.
ERROR: Could not get the class of object 292. Continuing.
ERROR: Unable to migrate all of the objects.

I do not find the error "Could not get the class of object" anywhere
with Google.