While importing an application to an environment I am getting following error.

While importing an application to an environment I am getting following error.
I am using appian 6.6.1

Error:
datatype {drl-preprod.paxpro.com/.../}Student_CDT "{drl-preprod.paxpro.com/.../}Student_CDT": An error occurred while creating datatype [uuid={https://drl-preprod.paxpro.com/suite/types/}Student_CDT]: An error occurred while trying to save the type information to the primary data source. No types have been imported. Cause: could not get next sequence value (APNX-1-4050-002) (APNX-1-4071-007)

Has anyone experinced such kind of error before? Any pointer will be helpful....

OriginalPostID-99566

OriginalPostID-99566