Unable to add numbers at the beggining of my TNS entry in the TNSNames Editor (4236329)

Unable to add numbers at the beggining of my TNS entry in the TNSNames Editor

EXAMPLE:

Add the number 0 in front of the TNS entry:

0MYINSTANCE =
(DESCRIPTION=
(ADDRESS=
(COMMUNITY=######)
(PROTOCOL=TCP)
(HOST=####)
(PORT=####)
)
(CONNECT_DATA=
(GLOBAL_NAME=####)
(SID=####)
)
)

When pressing Validate or Save, the zero is removed.

Result:

MYINSTANCE =
(DESCRIPTION=
(ADDRESS=
(COMMUNITY=#####)
(PROTOCOL=TCP)
(HOST=####)
(PORT=####)
)
(CONNECT_DATA=
(GLOBAL_NAME=####)
(SID=####)
)
)