我是DFP新手。我试图将图像集合中的图像显示到单个插槽中，时间间隔为5秒。我发现一些图像在5秒内显示，一些图像在2或3秒内变化。这种不一致看起来非常难看。我尝试使用google force console进行调试并找到了这个日志：
Status Time Description
Information Start Created slot: /116095010/marcom_0
Information 1 ms Google service JS loaded
Information 1 ms Created service: publisher_ads
Information 2 ms Associated service "publisher_ads" with slot "/116095010/marcom".
Information 2 ms Invoked queued function. Total: 1. Errors: 0.
Information 2 ms Setting targeting attribute user_state with value visitor for service publisher_ads
Information 2 ms Setting targeting attribute utm_source with value dfp for service publisher_ads
Information 2 ms Setting targeting attribute utm_campaign with value Nag_StartMyFreeTrial_Desktop_min for service publisher_ads
Information 2 ms Setting targeting attribute utm_medium with value internalcpc for service publisher_ads
Information 2 ms Setting targeting attribute undefined with value 20500102 for service publisher_ads
Information 2 ms Using asynchronous rendering mode to fetch ads.
Warning 3 ms **The ads cannot be refreshed because the GPT implementation Javascript is not yet loaded.**
Information 4 ms GPT implementation fetched.
Information 8 ms Calling fillslot.
Information 34 ms Fetching ad for slot: /116095010/marcom
Information 46 ms Invoked queued function. Total: 1. Errors: 0.
Information 432 ms Receiving ad for slot: /116095010/marcom
Information 433 ms Rendering ad for slot: /116095010/marcom
Information 433 ms Completed rendering ad for slot: /116095010/marcom
Information 824 ms Created slot: /116095010/collection-carousel-top-desktop_0
Information 824 ms Associated service "publisher_ads" with slot "/116095010/collection-carousel-top-desktop".
Information 824 ms Invoked queued function. Total: 2. Errors: 0.
Information 824 ms Setting targeting attribute user_state with value visitor for service publisher_ads
Information 824 ms Setting targeting attribute utm_source with value dfp for service publisher_ads
Information 824 ms Setting targeting attribute utm_campaign with value Nag_StartMyFreeTrial_Desktop_min for service publisher_ads
Information 824 ms Setting targeting attribute utm_medium with value internalcpc for service publisher_ads
Information 824 ms Setting targeting attribute undefined with value 20500102 for service publisher_ads
Information 824 ms Using asynchronous rendering mode to fetch ads.
Information 824 ms Refreshing ads.
Information 870 ms Fetching ad for slot: /116095010/marcom
Information 871 ms Service is already enabled
Information 871 ms Calling fillslot.
Information 881 ms Invoked queued function. Total: 2. Errors: 0.
Information 905 ms Created slot: /116095010/collection-carousel-top-desktop_1
**Error 905 ms Div element div-gpt-ad-1440572949275-0 is already associated with another slot.
Error 905 ms Exception when invoking function: Cannot read property 'addService' of null**
Information 905 ms Invoked queued function. Total: 2. Errors: 1.
Information 905 ms Setting targeting attribute user_state with value visitor for service publisher_ads
Information 905 ms Setting targeting attribute utm_source with value dfp for service publisher_ads
Information 905 ms Setting targeting attribute utm_campaign with value Nag_StartMyFreeTrial_Desktop_min for service publisher_ads
Information 905 ms Setting targeting attribute utm_medium with value internalcpc for service publisher_ads
Information 905 ms Setting targeting attribute undefined with value 20500102 for service publisher_ads
Information 905 ms Using asynchronous rendering mode to fetch ads.
Information 905 ms Refreshing ads.
Information 953 ms Service is already enabled
Information 953 ms Calling fillslot.
Information 955 ms Invoked queued function. Total: 2. Errors: 1.
Information 961 ms Created slot: /116095010/NAG-Visitor-desktop_0
Information 961 ms Associated service "publisher_ads" with slot "/116095010/NAG-Visitor-desktop".
Information 961 ms Invoked queued function. Total: 3. Errors: 1.
Information 961 ms Setting targeting attribute user_state with value visitor for service publisher_ads
Information 961 ms Setting targeting attribute utm_source with value dfp for service publisher_ads
Information 961 ms Setting targeting attribute utm_campaign with value Nag_StartMyFreeTrial_Desktop_min for service publisher_ads
Information 961 ms Setting targeting attribute utm_medium with value internalcpc for service publisher_ads
Information 961 ms Setting targeting attribute undefined with value 20500102 for service publisher_ads
Information 961 ms Using asynchronous rendering mode to fetch ads.
Information 961 ms Refreshing ads.
Information 962 ms Service is already enabled
Information 962 ms Calling fillslot.
Information 973 ms Invoked queued function. Total: 3. Errors: 1.
Information 1273 ms Receiving ad for slot: /116095010/marcom
Information 1273 ms Rendering ad for slot: /116095010/marcom
Information 1273 ms Completed rendering ad for slot: /116095010/marcom
Information 1277 ms Fetching ad for slot: /116095010/collection-carousel-top-desktop
Information 1730 ms Receiving ad for slot: /116095010/collection-carousel-top-desktop
Information 1730 ms Rendering ad for slot: /116095010/collection-carousel-top-desktop
Information 1730 ms Completed rendering ad for slot: /116095010/collection-carousel-top-desktop
Information 1733 ms Fetching ad for slot: /116095010/marcom
Information 2095 ms Receiving ad for slot: /116095010/marcom
Information 2095 ms Rendering ad for slot: /116095010/marcom
Information 2095 ms Completed rendering ad for slot: /116095010/marcom
Information 2099 ms Fetching ad for slot: /116095010/collection-carousel-top-desktop
Information 2488 ms Receiving ad for slot: /116095010/collection-carousel-top-desktop
Information 2488 ms Rendering ad for slot: /116095010/collection-carousel-top-desktop
Information 2488 ms Completed rendering ad for slot: /116095010/collection-carousel-top-desktop
这包含1个警告和2个错误。我用Google搜索但没有得到任何帮助。 我试图在页面的最后移动刷新代码，但这也无济于事。 请指教。