数据库发生错误。

{
	"$schema": "https://schemas.wp.org/trunk/block.json",
	"apiVersion": 3,
	"name": "core/cover",
	"title": "Cover",
	"category": "media",
	"description": "Add an image or video with a text overlay.",
	"textdomain": "default",
	"attributes": {
		"url": {
			"type": "string"
		},
		"useFeaturedImage": {
			"type": "boolean",
			"default": false
		},
		"id": {
			"type": "number"
		},
		"alt": {
			"type": "string",
			"default": ""
		},
		"hasParallax": {
			"type": "boolean",
			"default": false
		},
		"isRepeated": {
			"type": "boolean",
			"default": false
		},
		"dimRatio": {
			"type": "number",
			"default": 100
		},
		"overlayColor": {
			"type": "string"
		},
		"customOverlayColor": {
			"type": "string"
		},
		"isUserOverlayColor": {
			"type": "boolean"
		},
		"backgroundType": {
			"type": "string",
			"default": "image"
		},
		"focalPoint": {
			"type": "object"
		},
		"minHeight": {
			"type": "number"
		},
		"minHeightUnit": {
			"type": "string"
		},
		"gradient": {
			"type": "string"
		},
		"customGradient": {
			"type": "string"
		},
		"contentPosition": {
			"type": "string"
		},
		"isDark": {
			"type": "boolean",
			"default": true
		},
		"allowedBlocks": {
			"type": "array"
		},
		"templateLock": {
			"type": [ "string", "boolean" ],
			"enum": [ "all", "insert", "contentOnly", false ]
		},
		"tagName": {
			"type": "string",
			"default": "div"
		},
		"sizeSlug": {
			"type": "string"
		}
	},
	"usesContext": [ "postId", "postType" ],
	"supports": {
		"anchor": true,
		"align": true,
		"html": false,
		"shadow": true,
		"spacing": {
			"padding": true,
			"margin": [ "top", "bottom" ],
			"blockGap": true,
			"__experimentalDefaultControls": {
				"padding": true,
				"blockGap": true
			}
		},
		"__experimentalBorder": {
			"color": true,
			"radius": true,
			"style": true,
			"width": true,
			"__experimentalDefaultControls": {
				"color": true,
				"radius": true,
				"style": true,
				"width": true
			}
		},
		"color": {
			"__experimentalDuotone": "> .wp-block-cover__image-background, > .wp-block-cover__video-background",
			"heading": true,
			"text": true,
			"background": false,
			"__experimentalSkipSerialization": [ "gradients" ],
			"enableContrastChecker": false
		},
		"dimensions": {
			"aspectRatio": true
		},
		"typography": {
			"fontSize": true,
			"lineHeight": true,
			"__experimentalFontFamily": true,
			"__experimentalFontWeight": true,
			"__experimentalFontStyle": true,
			"__experimentalTextTransform": true,
			"__experimentalTextDecoration": true,
			"__experimentalLetterSpacing": true,
			"__experimentalDefaultControls": {
				"fontSize": true
			}
		},
		"layout": {
			"allowJustification": false
		},
		"interactivity": {
			"clientNavigation": true
		}
	},
	"editorStyle": "wp-block-cover-editor",
	"style": "wp-block-cover"
}