Revise conflict data resolution enhancement during data import

tidb-lightning/tidb-lightning-configuration.md

@@ -153,7 +153,7 @@ strategy = ""
 # Note that this parameter is only used in scenarios where the target table is empty.
 # parallel-import = false
 
-# Starting from v8.0.0, the `duplicate-resolution` parameter is deprecated. For more information, see <https://docs.pingcap.com/tidb/dev/tidb-lightning-physical-import-mode-usage#the-old-version-of-conflict-detection-deprecated-in-v800>.
+# The `duplicate-resolution` parameter is deprecated starting from v8.0.0 and will be removed in a future release. For more information, see <https://docs.pingcap.com/tidb/dev/tidb-lightning-physical-import-mode-usage#the-old-version-of-conflict-detection-deprecated-in-v800>.
 # Whether to detect and resolve duplicate records (unique key conflict) in the physical import mode.
 # The following resolution algorithms are supported:
 #  - none: does not detect duplicate records, which has the best performance of the two algorithms.

tidb-lightning/tidb-lightning-error-resolution.md

@@ -11,7 +11,7 @@ This document introduces TiDB Lightning error types, how to query the errors, an
 
 - `lightning.max-error`: the tolerance threshold of type error
 - `conflict.strategy`, `conflict.threshold`, and `conflict.max-record-rows`: configurations related to conflicting data
-- `tikv-importer.duplicate-resolution` (deprecated in v8.0.0): the conflict handling configuration that can only be used in the physical import mode
+- `tikv-importer.duplicate-resolution` (deprecated in v8.0.0 and will be removed in a future release): the conflict handling configuration that can only be used in the physical import mode
 - `lightning.task-info-schema-name`: the database where conflicting data is stored when TiDB Lightning detects conflicts
 
 For more information, see [TiDB Lightning (Task)](/tidb-lightning/tidb-lightning-configuration.md#tidb-lightning-task).
@@ -194,7 +194,7 @@ In this example, a data source is prepared with some known errors.
     EOF
     ```
 
-3. Configure TiDB Lightning to enable strict SQL mode, use the Local-backend to import data, delete duplicates, and skip up to 10 errors.
+3. Configure TiDB Lightning to enable strict SQL mode, use the Local-backend to import data, replace duplicates, and skip up to 10 errors.
 
     {{< copyable "shell-regular" >}}
 
@@ -207,8 +207,9 @@ In this example, a data source is prepared with some known errors.
         [tikv-importer]
         backend = 'local'
         sorted-kv-dir = '/tmp/lightning-tmp/'
-        duplicate-resolution = 'remove'
 
+        [conflict]
+        strategy = 'replace'
         [mydumper]
         data-source-dir = '.'
         [tidb]

tidb-lightning/tidb-lightning-physical-import-mode-usage.md

@@ -46,7 +46,7 @@ strategy = ""
 # Import mode. "local" means using the physical import mode.
 backend = "local"
 
-# Starting from v8.0.0, the `duplicate-resolution` parameter is deprecated. For more information, see <https://docs.pingcap.com/tidb/dev/tidb-lightning-physical-import-mode-usage#the-old-version-of-conflict-detection-deprecated-in-v800>.
+# The `duplicate-resolution` parameter is deprecated starting from v8.0.0 and will be removed in a future release. For more information, see <https://docs.pingcap.com/tidb/dev/tidb-lightning-physical-import-mode-usage#the-old-version-of-conflict-detection-deprecated-in-v800>.
 # The method to resolve the conflicting data.
 duplicate-resolution = 'remove'
 
@@ -104,7 +104,7 @@ Conflicting data refers to two or more records with the same primary key or uniq
 There are two versions for conflict detection:
 
 - The new version of conflict detection, controlled by the `conflict` configuration item.
-- The old version of conflict detection (deprecated in v8.0.0), controlled by the `tikv-importer.duplicate-resolution` configuration item.
+- The old version of conflict detection (deprecated in v8.0.0 and will be removed in a future release), controlled by the `tikv-importer.duplicate-resolution` configuration item.
 
 ### The new version of conflict detection
 
@@ -131,7 +131,7 @@ The new version of conflict detection controls whether to enable preprocess conf
 
 ### The old version of conflict detection (deprecated in v8.0.0)
 
-Starting from v8.0.0, the old version of conflict detection (`tikv-importer.duplicate-resolution`) is deprecated. If `tikv-importer.duplicate-resolution` is `remove` and `conflict.strategy` is not configured, TiDB Lightning automatically enables the new version of conflict detection by assigning the value of `conflict.strategy` to `"replace"`. Note that `tikv-importer.duplicate-resolution` and `conflict.strategy` cannot be configured at the same time, as it will result in an error.
+Starting from v8.0.0, the old version of conflict detection (`tikv-importer.duplicate-resolution`) is deprecated. The `tikv-importer.duplicate-resolution` parameter will be removed in a future release. If `tikv-importer.duplicate-resolution` is `remove` and `conflict.strategy` is not configured, TiDB Lightning automatically enables the new version of conflict detection by assigning the value of `conflict.strategy` to `"replace"`. Note that `tikv-importer.duplicate-resolution` and `conflict.strategy` cannot be configured at the same time, as it will result in an error.
 
 - For versions between v7.3.0 and v7.6.0, TiDB Lightning enables the old version of conflict detection when `tikv-importer.duplicate-resolution` is not an empty string.
 - For v7.2.0 and earlier versions, TiDB Lightning only supports the old version of conflict detection.