Can't figure why I end up with multiple records for the same date

dbase_schema.rb

reate_table "sib_transacs", force: :cascade do |t|
    t.integer  "requests"
    t.integer  "delivered"
    t.integer  "bounces"
    t.integer  "spamreports"
    t.integer  "blocked"
    t.integer  "invalid_sent"
    t.integer  "deferred"
    t.integer  "opens"
    t.integer  "unique_opens"
    t.integer  "clicks"
    t.integer  "unique_clicks"
    t.string   "tag"
    t.float    "cost"
    t.float    "turnover"
    t.float    "margin"
    t.float    "cpm"
    t.float    "ecpm"
    t.string   "partner"
    t.string   "name"
    t.date     "date"
    t.datetime "created_at",    null: false
    t.datetime "updated_at",    null: false
    t.float    "result"
    t.float    "orate"
    t.float    "crate"
    t.float    "roi"
    t.string   "campaign_name"
    t.float    "payout"
    t.string   "deal"
    t.string   "theme"
    t.string   "scenario"
    t.string   "sender"
  end

fetch.rb

def sib
    @sib ||= Mailin.new("URL","APIKEY")
end

def shoot_criteria_gmail_e_cia
   { "aggregate" => 0, "tag" => "WM-ABD-2018-GMAIL-E-CIA-COMBUSTIVEL", "end_date" => "2018-01-08", "start_date" => "2018-01-01" }
end

def shoots_gmail_e_cia
   @shoots_gmail_e_cia ||= sib.get_statistics(shoot_criteria_gmail_e_cia)
end

def needed_records_gmail_e_cia
  first_cut = shoots_gmail_e_cia.dig('data')
end

def campaign_records_gmail_e_cia
   @campaign_records_gmail_e_cia ||= needed_records_gmail_e_cia.map
end

def transac_gmail_e_cia_fetch
  def self.find_or_create_by(attributes)
    SibTransac.where(attributes).first || SibTransac.create(attributes)
  end

  def invalid=(value)
    write_attribute(:invalid_sent, value)
  end

  def invalid
    read_attribute(:invalid_sent)
  end
    # update/create
    campaign_records_gmail_e_cia.each do |record|
      shoot = SibTransac.find_or_create_by(record)
      unless shoot.update(record)
          # the data was invalid, so the shoot wasn't saved, do something about that here
      end
    end
  end