SDK sending SETs to default collection when not asked too

from time import sleep

from couchbase.cluster import Cluster, ClusterOptions

from couchbase.management.collections import CollectionSpec

from couchbase_core.cluster import PasswordAuthenticator

from couchbase.management.admin import Admin

ip = '127.0.0.1'

adm = Admin('Administrator', 'password', host=ip, port=9000)

adm.bucket_remove('test')

adm.bucket_create('test', bucket_type='couchbase', ram_quota='100')

sleep(10)

cluster = Cluster('couchbase://' + ip + ':12000', ClusterOptions(PasswordAuthenticator('Administrator', 'password')))

cb = cluster.bucket('test')

collMan = cb.collections()

run = 0

while run < 5:

    i = 0

    while i < 60:

        collMan.create_collection(CollectionSpec("collection" + str(i)))

        print("Create Coll: collection" + str(i))

        i = i + 1

    i = 0

    while i < 60:

        j = 0

        while j < 2500:

            coll = cb.collection("collection" + str(i))

            print("set: collection" + str(i) + " key" + str(j))

            coll.upsert("collection" + str(i) + "-key" + str(j), '{"key":"value1"}')

            j = j + 1

        i = i + 1

    i = 0

    j = 0

    while i < 60:

        j = 0

        while j < 2500:

            coll = cb.collection("collection" + str(i))

            print("update: collection" + str(i) + " key" + str(j))

            coll.upsert("collection" + str(i) + "-key" + str(j), '{"key":"value2"}')

            j = j + 1

        i = i + 1

    #input("SET DONE")

    i = 0

    while i < 60:

        collMan.drop_collection(CollectionSpec("collection" + str(i)))

        print("Drop Coll: collection" + str(i))

        i = i + 1

    run = run + 1

input("WAAIT")

  Couchbase Protocol, Set Request, Opcode: 0x1, VBucket: 0x35a

       Magic: Request (0x80)

      Opcode: Set (0x01)

      Key Length: 18

      Extras Length: 8

      Data Type: 0x00

      VBucket: 858 (0x035a)

      [Value Length: 22]

      Total Body Length: 48

      Opaque: 0x0004f612

      CAS: 0x0000000000000000

      Extras

          Flags: 0x02000000

          Expiration: 0

      Key: 

          Collection ID: 0x00000000

          Collection Logical Key: collection10-key0

      Value: "{\"key\":\"value1\"}"