ORA-14206 drop subpartition KO

Hi,

I’d like to rebuild a table

For this I have planned these actions

I'd like to rebuild a data subpartition :

For this, I have planned these action :

1/ export data :  expdp  user/pwd tables=schema.table.SYS_SUBP107   DIRECTORY=DATAPUMP DUMPFILE=myfile.dmp LOGFILE= my_file.log

2/ alter table schema.table drop subpartition subpartition_name ;

3/ impdp user/pwd tables=schema.table.SYS_SUBP107   DIRECTORY=DATAPUMP DUMPFILE=myfile.dmp LOGFILE= my_file.log

the action 1 is ok
the action 2 is ko with ORA-14206 error

I haven’t found the solution yet. may be necessary to rebuild all the partition ?

thanks for your help.