slapadd stop during import on a provider

[Patrice <gopat@nicematin.fr>]

Hi,

here is the manipulation I did:
I stopped my provider server.
I stopped my consumer server.
I removed all the files under openldap-data on my provider and consumer

I start my provider server and keep the consumer offline.
but when I import data into my provider server the import stop

I searched , and found that increasing checkpoint from 100 to 3000 made 
it work  in my slapd.conf
syncprov-checkpoint 3000 10

how this parameter can stop my import , and what would be the best thing 
to do ?
(I want to have my consumer server offline till the end of the importation)
should I import my data with syncprov parameters removed from my 
slapd.conf ?

at this time I searched but I haven't found the way to go.

I have openldap 2.3.19.


thanks in advance

Patrice