SAFE_POINT during restriction digestion with Exp3I

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Scenario:

1. Open "STEP1_pFUS2_a2a_5.gb" sequence.
2. Select "Actions > Analyze > Find restriction sites", check "Esp3I" enzyme in the appeared dialog, click "OK".
3. Select "Actions > Cloning > Digest into fragments". Add "Esp3I" to the "Selected enzymes" in the appeared dialog, click "OK".
   Expected state: the corresponding "Fragment" annotations have been created.
   Current state: there is a safe point, the following message is written to the log:

   [ERROR]Trying to recover from error: Unexpected query result code: 19 (constraint failed) at src/datatype/AnnotationGroup.cpp:127