[389-users] password policy

I have a password applied  globally like this:

dn: cn=cn\3DnsPwPolicyEntry\2CDC\3Dmy\2CDC\3Ddomain,cn=nsPwPolicyContainer,dc=

 my,dc=domain

passwordLockout: off

passwordGraceLimit: 50

passwordWarning: 86400

passwordInHistory: 3

passwordMinLength: 8

passwordMinCategories: 3

passwordStorageScheme: SSHA512

passwordChange: on

passwordMaxAge: 31536000

passwordCheckSyntax: on

passwordExp: on

objectClass: top

objectClass: ldapsubentry

objectClass: passwordpolicy

cn: cn=nsPwPolicyEntry,DC=my,DC=domain

In a sub OU, I have this policy:

# cn\3DnsPwPolicyEntry\2Cou\3DPOPS\2COU\3DEXTERNOS\2Cou\3Dmy\2Cdc\3Dmy\2Cdc\3

 Ddomain, nsPwPolicyContainer, POPS, EXTERNOS, my, my.domain

dn: cn=cn\3DnsPwPolicyEntry\2Cou\3DPOPS\2COU\3DEXTERNOS\2Cou\3Dmy\2Cdc\3Dmy\

 2Cdc\3Ddomain,cn=nsPwPolicyContainer,ou=POPS,OU=EXTERNOS,ou=my,dc=my,dc=domain

passwordLockout: off

passwordGraceLimit: 50

passwordStorageScheme: SSHA

passwordChange: on

passwordMaxAge: 31536000

passwordCheckSyntax: off

passwordExp: off

objectClass: top

objectClass: ldapsubentry

objectClass: passwordpolicy

cn: cn=nsPwPolicyEntry,ou=POPS,OU=EXTERNOS,dc=my,dc=domain

But when I try to add a prehashed password on this sub OU, I see this kind of error:

LDAP: error code 19 - invalid password syntax - passwords with storage scheme are not allowed

Is this an expected behavior even if in sub OU I have an password policy with passwordCheckSyntax set to off? If so, do I have any way to disable this behavior? (but I can not disable my global password policy)

PS: The password policy is respecting the fact of passwordCheckSyntax is set to off when I try to add a simple password like '1234'.